Add watermark with link (clickable) on every page of a pdf

Is there any way/script to edit a pdf automatically add the watermark (footer image) with a link on every page?

As I currently do this manually, I insert the watermark, and then I need to edit the pdf and drag a box over the watermark and add the link page by page.

If there's any way to do this automatically or add the link to full page (and don't only in watermark area), I appreciate it.

Thank you