Downloaded PDF File Stopped Working

I downloaded a PDF file from my email which is about 400KB in size only. I open it and tried to read it but it just crashed and stops working. I posted the screenshot of the error that I received.

Adobe Reader

Error signature

szAppName: AcroRd32.exe          szAppVer: 10.1.1.33          szModName: hungapp

szModVer: 0.0.0.0          offset: 00000000

Reporting details

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I don’t understand this type of error. I tried to download again the same file but the same error appears. Is the file corrupted or damaged? Please send me some help.