Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b76958c1f2ee3d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 04:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08cdc8b1c68b2700c7ddae7853a2a33c SHA-1: 87bac7f4ae8179c44c1b41d3742bbe4139e0d1e0 SHA-256: 93b76958c1f2ee3d9b41faa7fad5180722eb7452a1d037ed44614181e527cdc6
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=review+child+protection+conference+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links hosted on cdn.shopify.com, one of which is 'https://cdn.shopify.com/s/files/1/0437/5825/6286/files/dejopasavupajij.pdf'. The document body, though heavily obfuscated, contains the same suspicious URL and a benign-looking report title, suggesting a lure to entice clicks. The presence of a low-severity heuristic for urgency further supports a social engineering attack.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=review+child+protection+conference+report
    • http://files.davidholdsworthauthor.com/uploads/1/3/1/3/131380666/9739747.pdf
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/dejopasavupajij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/13016907835.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7339/5106/files/nunesiduwuwinubowowamura.pdf
    • https://cdn.shopify.com/s/files/1/0438/1986/0125/files/43978780259.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/463630227.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/24917778407.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8661/files/94789432037.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/bisuvubovinotirat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/konegovurolewoj.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_off00006e5c.bin
6eee34daf08f22703da91afc465dd0d31e00fe2eca31eb677b4c75df885a53d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5C 5012 bytes
font_01_sfnt_off00007f80.bin
51151f4f9409e6748a5de0b722745065fa3e5019cbe434ec21856209a7e05b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 9496 bytes

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