You can upload PDFs to a group Page in Sublime LMS ™.
Click the Pages link.
Click the title of the page you want to edit.
CLick Edit button
In the Rich Content Editor, place your cursor where you wish to insert the PDF document.
In the Content Selector, click the Files tab.
Click Upload a new file.
Click the Choose File... button to browse your local desktop computer for your PDF file.
Click the document you want to upload [1] and click the Open button [2].
Click the Course Files drop down menu and choose where you would like to store the file.
Click the Upload button to upload your file.
Look in the Rich Content Editor to be sure that the file was properly inserted where you left your cursor. If you look closely you will see the file name flash yellow the moment it is inserted in the page.
Click the Save changes button.