Klett sells the official e-book version (blinklearning platform). This is an interactive PDF where you can type answers directly into the document. It includes all audio. Search for "Netzwerk Neu A1 Intensivtrainer BlinkLearning." This is the safest way to get a high-quality digital file.
The Intensivtrainer relies on listening comprehension (Hörverstehen). A simple PDF does not include the MP3 audio tracks. Many pirate versions strip the QR codes or download links. Without the audio, you cannot complete half the exercises. netzwerk neu a1 intensivtrainer pdf