It's been a bit since I last parsed out a SEO poisoning cluster. Here's a handy cluster of 623 domains. Each of them is a wildcard.
https://gist.github.com/rmceoin/beea16dc3ea1251851bc1f7e8ee7e9b7
Using these domains they each potentially have hundreds of thousands of results within Google.
A cluster is a set of sites that each point to others within that cluster. So, you just gotta grab one, look for links and follow the web to find them all. The fun part is this cluster is only M through P, so presumably only 4/26 of the total.
A quick sample of SSL certs shows these have been at it since around Sept 10th/13th.
Earlier in the year they seemed to like country code TLDs like .FR or .DE. Now they're all in with .COM.
#SEO_poisoning (is that a good hashtag for this?)