Scripting for Photoshop/Acrobat: if ...pdf dimension...do...

Hello together,
I really need your help.
I have a folder with a lot pdf-files with 3 different Pages sizes.

e.g.
Test1.pdf     (pagesize: 297x210mm)
Test2.pdf     (pagesize: 250x250mm)
Test2.pdf     (pagesize: 100x100mm)

Now, I need a sript to sort this files in different folders

C:\images_297x210\
C:\images_250x250\
C:\images_100x100\

Files don't have to be changed. I only have to move them to the folders.
I tought, I can't be a big problem. But I really can't solve the Problem.
I'm sure, with Photoshop-Script, it's not complicated to check size and save in different folders.
But If I open in Photoshop, it's not same pdf quality after save agin.
Is there a Script possible for Acrobat? Or how can I solve this problem. Thank you for help

Best regards

Alexander