At first glance, the self-proclaimed “pet portrait” app Viefur appears to be just another AI slop generator. Using digital coins sold in the app—around $4 will buy 130 coins—pet photos can be turned into an “anthropomorphic portrait,” with the critter dressed in “human clothing” and inserted into bizarre scenes. Think a hamster wearing beach shorts, sunglasses, and lounging in a swimming pool or a Hawaiian shirt-wearing cat, drinking from a coconut.All of this is cover for what appears to be the...