Two Wordpress sites that have been hacked all to hell, with about 30 other sites linking to them and loading in the background - and an occasional re-direct thrown in for good measure. It's been going on for about a month.
Wordpress and PHP expert needed to get down in the weeds and find the culprit.
Only the best experts will be capable of doing this job. You must have great patience and be great at reading & writing code.