Automation in DOwnloading some files from websites using powershell

Hi,

I am facing problem to download some files(such as pdf files) having name of all files from internet websites using powershell.

i am facing problem because when we serch for one files urls of dites becomes change.url is not same for all files name.and also i have to download latest files on that sites for particular file name.

please suggest if there is any solution.