Google Trends seems to be a nice reference tool for the attackers to know which hot topics currently generate the maximum of public interest - a compass that leads them to the victims.
Here is another example of how a randomly picked up hot topic (today it was "Chris Brown Apology Video") predictably leads to rogue antispyware installations.
The cyber crooks behind this malware seem to be catching fish on a naked hook; until the fish gets smarter, they'll probably stick to these cheap tricks for awhile.