Malicious Google Analytics Referral Spam
For the last few years the number of automated ‘robots’ or ‘bots’ combing the web has been greater than the number of human visitors. Of course there are good bots (googlebot, google analytics bot, yahoo etc) and bad bots (niko, webscanner, etc).
Bad bots test sites for vulnerabilities, data gathering, weak systems and sometimes extra annoying things. Like the recent trend of bots using google analytics tracking code to spam referrers in peoples google analytics, making huge traffic appear (and links to that source).
What’s the point? To get people to click in their google analytic links wondering what all the traffic is from and infect your PC with malware.