No, that's not how it works. A Nation advances on the Political Track if it has an Event card played against it that initiates an attack by an Army (also Ent cards and "Dead Men of Dunharrow"). It doesn't matter whether any actual casualties are inflicted, and cards that inflict casualties that don't result from attacks by Armies don't advance the Nation on the Political Track.
"Faramir's Rangers" does not initiate an attack by an Army, so it never advances Sauron on the Political Track. "The Ringwraiths Are Abroad" can initiate an attack by an Army, so it would advance the target Nation on the Political Track if the attack option is chosen, regardless of whether or not the attack results in casualties.
"War is much more fun when you're winning!" - General Martok