This detection was added in Anti-Beacon 6.7.
Anti-Beacon treats this as telemetry because Adobe’s Acrobat enterprise documentation identifies a usage measurement feature that controls participation in product improvement data collection. Adobe describes the setting as specifying whether to “send usage measurement data back to Adobe” and documents the disabled state as “Don’t send usage details to Adobe” (Adobe Acrobat Enterprise Toolkit: UsageMeasurement).
Anti-Beacon disables Acrobat Reader DC usage measurement so Reader does not send usage details to Adobe through this feature.