Besides images and videos, you can upload any file type as long as it is first saved or exported as a PDF. You can create and view PDFs using free software from Adobe. Download and install Adobe Acrobat here.
Saving a Word doc as a PDF
Click the Microsoft Office Button, select the arrow next to ‘Save as’, and click ‘PDF’.
Under ‘File name’, type or select a name for the document.
Under ‘Save as’, click ‘PDF’.
PDFs can be uploaded just like other image formats by clicking the little '+' button to the left of the story editor and selecting the PDF option.
When you upload a multi-page PDF, it will appear as one long image with every page displaying.