As of this writing, here is the factual status of the Anima Satanae PDF:
However, you will find results if you search the term on: Anima satanae pdf
Recommendation: If you are a serious researcher, do not waste time on the PDF. Instead, study the Anima Christi (Saint Ignatius of Loyola, 16th century) to understand the prayer being inverted. Then examine the Grimorium Verum (published 1517, but likely older) for authentic Renaissance demonic seals. The "Soul of Satan" idea is a modern, albeit creative, synthesis. As of this writing, here is the factual
For theistic Satanists and traditional occultists, attempting to invoke the Soul of Satan without proper banishing or protection is considered reckless. However, most high-level practitioners dismiss the Anima Satanae as "edgy fan fiction" that disrespects real demonolatry traditions. However, you will find results if you search the term on:
If the contents described above are accurate, the rituals demand sensory deprivation and sleep loss. This can trigger latent psychosis, depersonalization disorder, or severe anxiety in vulnerable individuals. The "curse" is likely a self-fulfilling prophecy: if you believe a text will ruin your life, you will manifest chaos.
Curiously, most searchers claim the PDF starts with a warning in red text: "Qui legit, obligat se. Qui seruat, perit." (He who reads, binds himself. He who saves it, perishes). This is a classic literary trope designed to prevent digital distribution.