Get the Whitepaper called Heap Taichi: Exploiting Memory Allocation Granularity in Heap-Spraying Attacks.
You can download it from the following link: https://packetstormsecurity.com/files/download/96785/heap-taichi.pdf
Source: https://packetstormsecurity.com/files/96785/Heap-Taichi-Exploiting-Memory-Allocation-Granularity-In-Heap-Spraying-Attacks.html