Wow. They've been around since 2010 with over $10,000 billed. Maybe they never asked for this before. I couldn't see where to flag the job, I had already declined. With the note that it was copyright infringement.
If any admin cares, it's about graphic design for canvas wall art.
Go to your notifications and click on the one notifying you that you were invited to the job. You may be able to retrace your steps to the job post and if it's still up, flag it.