Open a URL add '.pdf' after the field content of URL prefix in using Views as Hyperlink

I want to open a URL add '.pdf' after the field content of URL prefix in using Views as Hyperlink. I was save a pdf file in web folder and I want open it by click on the list page with field (file name) , what is the script can add a '.pdf' after the URL prefix. please give me a help. Thanks
example :

Display field content = job_no

URL prefix : https://abcde.com/workorder/
I want to make like this https://abcde.com/workorder/12345.pdf