You need to upload the file in File Manager, make it viewable to Public, and link to it on your website.

• Go to File Manager.
• Select Copy Shareable Link on the row of the file you wish.
• At the far right of each file are three little dots. Click on those to open up a menu.
• Select Public.
• Go to Webmaster on the left-hand navigation bar.
• Choose the last Page in the display, which it titled Add New Page (not the Add News blue button).
• Scroll down and select Link to Another Site.
• Paste the file link, name the page, and set the navigation as you wish.

The file will now open when the user visits that location on your website and clicks on it.