If you're working in a WYSIWYG editor, you can add a link to a file such as a PDF by uploading your file to Cascade, then browsing for it in the WYSIWYG.
1. Upload your file:
Click the Add Content button and use any file type option available to you.
These options are set up by your CMS administrator so they might be named something like "File", "PDF" etc.
If you don't see any file options available to you in the Add Content menu, you'll want to contact your CMS administrator or web team for further assistance.
2. Add a link to your file in the WYSIWYG:
Click the Insert/Edit link button, choose Internal for the link type, and browse for the file you just created.