I have a pdf file which I did not manage to open properly. I tried with Konqueror, xpdf and pdfedit. What is displayed is this message:

To view the full contents of this document, you need a later version of the PDF viewer. You can upgrade to the latest version of Adobe Reader from www.adobe.com/products/acrobat/readstep2.html
For further support, go to www.adobe.com/support/products/acrreader.html
Which program should I use to open this file, please?