My grandmother had to work in factories under the Nazis toward the end of WWII, and anyone doing this sort of thing would have been taken outside and shot.
She says they were told not to work too slow, because that was sabotage, and not too fast, because that was bad for the morale of the others. Her main problems were with the POW workers (slaves), who tried to kill all the Germans they could. Several times, heavy weights were dropped off railings just above her, etc.
If I were the OSS I would have written up this section of the booklet and then leaked it directly to the enemy at all possible levels. What better way to cause chaos among the German bureaucracy than to spread paranoia that anyone engaged in normal bureaucratic dithering, patriotic speechifying or bad handwriting might actually be a saboteur?
If you want to read something interesting regarding sponsored subversion, I recommend 'Legacy of Ashes' by Tim Weiner. Fantastic hacks and incredible, yet true and widely uncredited events in US and world history executed by the OSS and CIA.
The PDF certainly seems authentic to me. The language and technology seems correct for the period. I was surprised that some of the units were mixed standard/metric, such as "75-100 grams for each 10 gallons of gasoline".