How to add PDF Files to a page

Hi!

I have 3 pdfs that I want subscribers to gain access to as soon as they finish the subscription process.
We use Mail chimp, but we do not pay to be able to send automated emails and won’t be able to for a while. There is no way (that I can think of) to immediately send the subscriber an automatic email with the pdf files. However, mail chimp will send them a “welcome” email of sorts, and I can include a link in this email. So I thought of creating a page on the website with the pdfs so the subscriber can access it through the link. I added the pdfs as images to a page, but they appear very small, is there anyway for me to add them as actual pdfs or a way for the person to download them?

Also, if anyone knows of any better way of doing it, via plugin or something I may be missing, please tell! :)

Thanks!