I did receive email looking like information from Polish national forwarder with almost identical side with references to real side. Funny because it contain information about not delivering future dispatch.
It has zip file pretending to be acrobat reader file but it is a exe file.
So obviously virus. Yours antyvirus didnt find any thing on Virus total page it says it is only virus for 2 from 50 antyvirus programs.
Link to page http://poczta-polska.info/XXXXXXXXXXXX
just type always the same numbers 3770 and click "Pobierz" and You receive Your virus.
Please correct Your program.
EDIT: REMOVED POTENTIALLY DANGEROUS LINK