Whatsapp android brower wp20.ru spyware

Hello,

I have been informed from a friend he received from my whatsapp android application some link pointing to .ru websites . I used norton 360 on my android samsung smartphone and this one detected nothing ? After checking Whatsapp application status I notice there where a link wp20.ru/xxxxxx. When looking who is behind this adress I notice it was an already  know agressiv navigator spyware but found absolutely nothing on Norton solution ?

So first I uninstalled whatsapp, my question now is how can I be sure this spyware is completely removed, some products (spyhunter non norton) know this spyware, but I will not use it without more details ?

Can someone help please ?

Thanks in advance.