Michael Cottam is one of the top Backlink SEO consultants and has put together a compressive list of spammy negative SEO attacks that can get your website an algorithmic penalty. You can visit his website for the full list here:
Here is a small sneak peek:
These are a lot like the German TLD link farm. Often you’ll see malware on the GA, GQ, and CF sites, and sometimes the TK sites. Some of these do 302 redirects to legit sites, so you might be fooled into ignoring those links.
If you want to learn how to quickly download your backlink domains and sort for spammy use my free SEO backlink tool.