The revolutionary Pamphlet is a miscellaneous item obtained from a woman near the Kremlin in Moscow. The pamphlet will not sell for any value anywhere. However, if caught still with the pamphlet in your possession when in Vladivostok, you will be arrested and put in jail for several days. Keep in mind that you will only be arrested if you explore the city or stay the night in a hotel there.
*Arrest and jail time is almost unavoidable in Vladivostok. If someone can add detail on how long the jail time is, and if it's upon arrival in the city, that would clarify things.