Quasi-periodic pulsations (QPPs) in solar and stellar flares pose a persistent puzzle in solar physics due to their unclear origins. This paper investigates the potential connection between coronal mass ejections (CMEs) and the generation of QPP, particularly focusing on observations of the K-corona using white-light. Notably, a post-CME shock wave emerges as a candidate mechanism driving QPP, as evidenced by distinctive features in the observed light curve. Employing the global wavelet transform technique, we identify an eight-minute oscillation associated with the shock wave, hinting at a potential link between magnetoacoustic waves in the corona and the observed QPP phenomena. The study contributes to clarifying the origins of QPP by identifying the post-CME shock wave as a potential driver of this phenomenon.