Mona Gandhi Markus Jakobsson Jacob Ratkiewicz Badvertisements: Stealthy Click-Fraud with Unwitting Accessories. 131-142 2006 1 J. Digital Forensic Practice 2 http://dx.doi.org/10.1080/15567280601015598 db/journals/jdfp/jdfp1.html#GandhiJR06