Mail flow rule to capture a constant part of a hyperlink address in the email body

I am getting some serious quantities of SPAM, and SPAMfighter only picks up about 50% of the SPAM emails.

All the emails have a hyperlink address (associated with an image)

https://random.page.link/random

Where I wrote random on top- there are random characters, but the .page/link/ part is constant

I tried creting amail flow rule to search for ".page.link/" or "https://*.page.link/*" on the subject or body, but neither of those work.

Anyone have an idea how to get the mail flow rule to capture the hyperlink?

Thanks for any help