unwanted php adcash popup on my site

dear sir,

my site https://www.sarkarijobsresult.com

that showing unwanted popup and it’s address is “https://www.adcash.com/script/packcpm.php?r=36910”

this is a address that show when we click on my site any link and after some time this address redirect to another web address

so now please tell me some one how can face this problem

thank you