I'm not very familiar with this specific 'cancion de pulp fiction'. But if it's related to 'Pulp Fiction', it might have a sense of coolness and edginess, similar to the movie's style.
I'm not entirely sure about the specific origin of 'cancion de pulp fiction'. It could be a song inspired by the movie 'Pulp Fiction'. Maybe it was created by a fan or an artist who was really into the movie's unique style and story. There could be a whole backstory to it that involves the cultural impact of the movie on the music scene.
Well, 'la caricatura de la tribuna de hoy' could translate to 'The caricature of today's tribune'. It could be related to a visual representation or satire featured in a current forum or publication. Without further details, it's a bit vague though.