PDFcoffee is an online platform offering a vast library of PDF files, including RPG materials. You can find the Pulp Cthulhu PDF on PDFcoffee, allowing you to access the game rules, settings, and adventures.
If you want a full campaign, buy The Two-Headed Serpent (the official Pulp campaign). It spans the globe from the Amazon to Africa to lost cities in Antarctica. The PCs fight serpent people, Nazi sorcerers, and a Cthulhuoid megastructure. It is the Raiders of the Lost Ark of TTRPG campaigns. Pulp Cthulhu Pdfcoffee