I don't think you can change it for just one file. It is a setting that uses the suffix, the .xxx part and applies to every file with that suffix.
Open Windows file explorer and right click a PDF file, select "properties". Make sure the "general" tab is selected and at the top of that tab you will see "Opens with" and a button, "Change...". Click the button. Now find the program you use by default to view PDF files. If it is not shown, click "more apps". If it is still not shown click "look for another app on this PC". When you find the app select it and click OK. In the properties window click "Apply". That should do it!
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