Discount by UTM

[RytisLT]

Hello,

I believe that the module I need is already done, but I can't find it

I need module which will change product price depending on visitor source (best way by UTM).

So idea is: I get visitor from AdWords with gclid UTM and module automatically adds X% discount code. The price with discount should be shown in product list and product page.

 

Any ideas?

Thanks!