The really crazy thing about using ad networks to distribute malware, which I think is very much still unrecognized, is how targeted you can make it. You can,

The really crazy thing about using ad networks to distribute malware, which I think is very much still unrecognized, is how targeted you can make it. You can, for example, target people over the age of 70 that live in high net worth areas, or people that live geographically close to some organization you're targeting specifically, in hopes of hitting an employee, or someone in their family.