exiftool says it&#x27;s PowerPoint, surprisingly:<p><pre><code>  $ exiftool Build+Book+Backblaze+60+Drive.pdf  | tail -n5 | head -n3
  Title                           : 7400-0283 Rev A OMS Assy Backblaze 60 Drive
  Producer                        : Mac OS X 10.11.3 Quartz PDFContext
  Creator                         : PowerPoint</code></pre>