Another more likely possibility would be to identify people who are on the list and compare all their installed apps and search for a common denominator.
People delete apps though, you'd need their entire history to cross reference that. Not to mention false positives - how many people have the Twitter or Facebook app installed, for example?
You might still be able to find an app that has a much higher installation rate for users on the leaked list that for users who aren't.
Of course, that wouldn't be a proof but merely a first step to narrow the possibilities.
