I'm not sure how long it's been going on but we are getting somewhat random requests for /images/hypersphere-2010.png showing up in our error logs. We've never had such a file on our site. Google-ing it hasn't revealed much except that it appears in a small number of other website log files also. We cannot duplicate the requests when we test things ourselves. The logs show a rate of about 10 requests per hour (average) from a wide number of IP addresses and various user agents. Here's a sample from the past couple of days (in order of popularity):
1Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.165022.831050
2Mozilla/5.0 (Windows NT 6.0) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.60 Safari/534.244319.634703
3Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.162611.872146
4Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.16188.219178
5Mozilla/5.0 (Windows NT 6.1) AppleWebKit/534.32 (KHTML, like Gecko) Chrome/13.0.748.0 Safari/534.32188.219178
6Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.16156.849315
7Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.35 (KHTML, like Gecko) Chrome/13.0.761.0 Safari/534.35156.849315
8Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.205 Safari/534.16104.566210
9Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.50 Safari/534.2462.739726
10Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.1652.283105
11Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.648.204 Safari/534.1652.283105
12Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.57 Safari/534.2452.283105
13Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.120.913242
14Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.60 Safari/534.2410.456621
Clearly Chrome seems to be a common thread. (There is one non-Chrome Safari in there however, #13). Unclear why that would matter though.
When there is a referrer entry in the logs, it shows that the request is coming from one of our own webpages but there is no discernible pattern to those pages. We've looked into the possibility that it was coming from an advertising script, but many of the referring pages don't have ads on them which shoots a hole in that theory.
Anyone know anything about this file? Anyone else seeing similar log entries?
Thanks in advance!
- Chip