Hi. For the external binaries, there aren't any PDF files in your post, just Word and Excel files, and it looks like three Word documents and one Excel file were indexed. What happens when you try a search on a word in one of those DOC/XLS files?
Also, in
this thread, I've added a comment and some extra code to echo more stuff. The comment shows where to change _PDF to either _MSWORD or _MSEXCEL in the posted code in order to echo stuff specific for those binaries.