Most free PDFs named “Almanca Gramer” are but lack depth for intermediate learners. They often feel like condensed cheat sheets rather than proper textbooks.
Almanya'nın resmi kültür kurumu olan Goethe Enstitüsü'nün harika ücretsiz materyalleri vardır.
If the PDF you have is from a known publisher like Hueber or Klett (not a free scan), ignore my criticism – those are excellent. But if it’s a generic 50-page anonymous PDF, treat it as a supplement, not a textbook .