If you are looking for formal analysis rather than a download link, I recommend searching these databases:
: You can find technical papers on how the film’s unique visual style—painting over live-action footage—contributes to the "drug-induced" or "dream-like" atmosphere of the story. A Scanner Darkly YIFY
Could you clarify if you are looking for a about the movie, or if you were trying to find a PDF of the original novel by Philip K. Dick? If you are looking for formal analysis rather
: Many papers analyze the "Scramble Suit" and the "Scanner" as metaphors for the loss of identity and the pervasive nature of state surveillance in Philip K. Dick’s work. : Many papers analyze the "Scramble Suit" and
: Critics often explore the film as a semi-autobiographical cautionary tale, focusing on the character Bob Arctor’s descent into brain damage and dissociation. Where to Find Critical Papers
: Excellent for peer-reviewed articles on the film's philosophical underpinnings.
: Search for "A Scanner Darkly film analysis" or "Philip K. Dick surveillance studies."