Page is a not externally linkable
-- Google AdSense
---- Botnet steals 'millions of dollars from advertisers'
jpch - 5:23 pm on Mar 20, 2013 (gmt 0)Thread source:: http://www.webmasterworld.com/google_adsense/4556857.htm
More info from that companies blog:
Looks like it was mainly targeting CPM ads Vs. CPC ads due to low CTR.
Brought to you by WebmasterWorld: http://www.webmasterworld.com