Some info about trojan clickers
Trojan Clickers
This family of Trojans redirects victim machines to specified websites or other Internet resources. Clickers either send the necessary commands to the browser or replace system files where standard Internet urls are stored (e.g. the 'hosts' file in MS Windows).
Clickers are used:
To raise the hit-count of a specific site for advertising purposes
To organize a DoS attack on a specified server or site
To lead the victim to an infected resource where the machine will be attacked by other malware (viruses or Trojans)
http://www.viruslist.com/en/virusesd...40521#clickers