You can add a PDF to a page or post the same way you add a photo or other media.  It will create a link to the PDF. Please follow the steps below:

  1. Select the "Add Media" button on the page or post you want to add the PDF to. 
  2. Select the "Upload Files" tab and then select the "Select Files" button to select the PDF file.
  3. Make sure the PDF file is selected and select the "Insert into page" button.
  4. The PDF file will show up as a link. Remember to select the "Update" or "Publish" button.