First you will need to convert the document to a word document. If you already have a word copy of the document (EG: It was converted from word into PDF) you can use that original word copy.
In word click File > Save As > Browse
Select the location you would like to save it in and in the "save as type" box select "PDF (*.pdf)"
Under this drop down you can then select the text next to "Authors" and "Title" to change the properties. The "title" field on the right is what will appear as the tab name
You can now upload this new document.