I have a question CPA AND HACK WEBSITE

Welcome
I have a question. I find some landing pages on different sites in the form of PDF
They create an article inside the article, you find a link to the landing page
Is this a good way to get traffic?
I hacked the sites, can I benefit from them?

Yes. All we need to do is upload the pdf to edu sites.
site:edu "allowed file types" but very hard to rank