OK. Now that I have looked at the screenshot.
On the surface, if it only indicated it was coming from a particular web site, then it looks like the web site in question has some malicious code on it which is repeatedly trying to send you that file, even though you did not request it.
Did you have multiple tabs open at the same time? If so, then it was coming from one of the sites open on another tab.
If you also saw one that indicated it was coming from THIS web site, then please post that screenshot as well.
UserAgent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:220.127.116.11) Gecko/20110701 Iceape/2.0.11