Hi Inna,
Sorry! I'm not able to understand "Word attached file"?
Is it that you are referring a word document Binary content (via an hidden link) from database table or referring the Word file from some server location?
See this sample app (I'm referring the word document imported in the Data Tab/Resource Directory of the application module)

URL Syntax:
"http://docs.google.com/gview?url=http://YOUR_FILE_PATH&embedded=true"
"http://docs.google.com/gview?url=" + "https://personal-zm7txfa3.outsystemscloud.com/TWA_Lab/Sample.docx" + "&embedded=true"
If this is not what you are looking for, could you please elaborate more about your use-case. So that we can help you better :)
Hope this helps you!
Kind regards,
Benjith Sam