Can I use any pdf for free signup offer--not just made in CC

Hello!

I need to revise a free pdf (free "tips" sheet) to offer as a free email signup gift.

I created existing version in Constant Contact, which is still editable.

Can I create doc in my own word processor application, and upload it as a pdf, then offer that instead?  It would be based on content I had created in my existing free tips sheet.

Thanks in advance!

Regina