This type of title is common in French Individualist or Futurist art traditions, which often use "the language of rupture" to challenge traditional concepts of beauty. It likely aims to "complicate narratives" about decadence and naturalism, much like the analytical approaches discussed by Queer Idiosyncrasies . Writing the Paper: Points to Explore
Analyze the "dur" (hard) aspect. Does it refer to the medium (e.g., film grain, industrial soundscapes) or the subject matter? Moon Flower - Anal dur pour une fleur de lune m...
If this is a specific indie film you've seen, focusing on the between the moonlit flowers and the "hard" urban or physical scenes would be a strong starting point for your analysis. This type of title is common in French