We can get "Visitor Activity" data by Fivetran.
And it have "custome_redirect_id" that related to "Custom Redirect", but we can not get "Custom Redirect" data.
Pardot provide API for Custom Redirect Object. 
https://developer.salesforce.com/docs/marketing/pardot/guide/custom-redirects-v4.html

I want to get it by Fivetran.