Simply owning the PDF does not guarantee B2 mastery. Schubert materials are dense. Follow this workflow:
The following materials are available for direct download on the Schubert Verlag website Erkundungen DaF B2 - SCHUBERT-Verlag schubert verlag b2 pdf
Avoid the "free PDF" traps. They will waste your time and likely provide an obsolete, broken file. Invest in the legitimate Schubert Verlag B2 PDF – your German B2 certificate will thank you. Simply owning the PDF does not guarantee B2 mastery