In order to upload a Word or PDF file to your page, I suggest you to use DOCS, an application which allows you to create or post a document to Facebook. To upload the file, go to Add a Doc > Upload a Doc and click Browse to select your document. After the file is added you can choose the Viewers or the Editors. Furthermore you can add tags for your document.
Also in order to upload a Word or PDF file to Facebook, you can convert the document to an image using applications like: PDF to JPG Converter or DOC to Image Converter. Another solution is to upload the document to a sharing website and to use the link to post it to Facebook.