Have you had problems viewing pdf files from our site and other websites with Google Chrome recently?
Google have changed their rules about which plugins they will allow to work with its browser. As a consequence you may get rubbish when you try and open a pdf file.
There is a work around.
Right click on the link to the pdf file and select "Save link as.." Then save the file to your computer and open the file from there.
Alternatively, as John suggests, use Microsoft Edge or Firefox.