Use the file manager to upload the doc. I recommend using a virtual folder.
Find the file in the downloads area. Click on it to pull up the download box. Look for the link address in the download box. Copy that link address to the clipboard for use in a link to the file.
In whatever webpage you want to create a link to the pdf, you can use the link icon (with the chain links on it) in the webpage editor to set up a link to the file using the link address you copied to the clipboard above.
If you want to get fancy there are ways to create a thumbnail image of your PDF and associate that with the link so that when the user clicks on the image, the download of the PDF is activated.
Here are the relevant docs:
support.toastmastersclubs.org/doc/item/file-management
support.toastmastersclubs.org/doc/item/linking-to-files
