To access the PDF test file, you will need a free PDF reader application.

Example for Windows and Apple PCs: www.adobe.com/reader
Example for Android smartphone: https://play.google.com/store/apps/details?id=com.adobe.reader
Example for iPhone and Apple devices: https://itunes.apple.com/us/app/adobe-acrobat-reader-annotate-scan-send-pdfs/id469337564?mt=8