While sifting through some of my site’s comment spam, I noticed a clever trick one spammer used in an attempt to fool my website’s defenses.
Instead of directly linking back to their site, they posted links that take advantage of an Adobe redirect script. For example, instead of linking to https://spam.com/, they linked to https://store.adobe.com/cgi-bin/redirect/?https://spam.com/.
Here’s an example you can try:
https://store.adobe.com/cgi-bin/redirect/?https://www.macromedia.com/. Oh wait, I guess that’s now an infinite loop.