Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffa67f40b16be70…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 13:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b019bafcf3f13a07566571407c003e SHA-1: 23f06651df9136b8df449b8bb6970010b93833ad SHA-256: 2ffa67f40b16be70d4078fbcf83f5e524eeb3478a2f4b7537d4971cef17bea99
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=statistical+database+security+pdf', is identified as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=statistical+database+security+pdf
    • http://files.mallorybyers.com/uploads/1/3/0/9/130969192/jafixu-kavufevutep-sulidusapiti.pdf
    • http://files.gradyhenlydecorators.com/uploads/1/3/0/8/130874060/fasowodamoferapuru.pdf
    • http://files.northforkpoa.org/uploads/1/3/1/6/131636725/sijorov_vukamivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/bls_provider_manual_2017_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/30902995667.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/cirrose_heptica_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/stars_wars_the_force_unleashed_psp.pdf
    • https://cdn.shopify.com/s/files/1/0434/6714/5366/files/47031706679.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7607/files/60515358964.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/nenadetadam.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/lapakoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/34095450162.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/72628496056.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_off000063e0.bin
8142739e1f1655190da7f981fcf4fb03500f5f47b97f8bdddf104402d9742a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 5496 bytes
font_01_sfnt_off0000769b.bin
8478ee9ace53fca2e8953a45342d0a987e7ba1d52b8bf5855ab371f765e2e027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 13008 bytes

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