Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b97fd5e9bd9027…

MALICIOUS

PDF

45.7 KB Created: 2020-07-31 03:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37fac2775ff6c722c54e7b3c45bfb647 SHA-1: 0ee441691875ac3b8d8eb162aaa0417157aa6ded SHA-256: 20b97fd5e9bd90276f318a9b17028b183e02f38f72ceb02fde8b1405dfe9b79f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bankers+adda+reasoning+pdf+download'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0432/6785/0390/files/72136194113.pdf'. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, limiting the analysis of direct payload execution.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bankers+adda+reasoning+pdf+download
    • http://files.9roundmemphis.com/uploads/1/3/1/4/131453902/zaximanexaxedezepo.pdf
    • http://files.davidallisondewitt.com/uploads/1/3/1/0/131070567/3107749.pdf
    • http://files.topnotchphorses.com/uploads/1/3/0/9/130969169/3019185.pdf
    • http://files.topnotchphorses.co
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/72136194113.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1171/files/83983390348.pdf
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/pedixujod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4873/8720/files/dezonukunuwuselajusufin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/20754581951.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/65108390782.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5754/files/55168978864.pdf
    • https://cdn.shopify.com/s/files/1/0438/0930/8829/files/siwuwotezutajigisop.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/kaxejiwemumuvokigifare.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/vezorixevakavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/gepesizedotorugobujaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/50990843640.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/80650261188.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/64370248443.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007494.bin
cccd1c3dbcf180b440e623527f0de9a9701413e386c6f1dc7cd4b9b9fd59835a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 5120 bytes
font_01_sfnt_off0000861b.bin
13601a87815ab2c00bb229e768af5e3adf1354b571cc1123fbcf3ca4d242f737
pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 10380 bytes