Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a314db684178b26…

MALICIOUS

PDF

42.5 KB Created: 2020-08-05 02:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81e3960c4d6f7760efcf91f29343d75d SHA-1: 657f4492d7a42071b7863b84226ff3e0085bf54e SHA-256: 8a314db684178b26cade08ff16858071c319c219fe3ee174024ac0bb51f3c244
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary link pointing to a known malicious redirector. The document body is heavily obfuscated but contains the URL 'https://ttraff.ru/pify?keyword=elements+that+hinder+effective+communication+pdf', which is likely intended to trick the user into clicking through to malicious infrastructure. No scripts were extracted, limiting the analysis of the payload.

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=elements+that+hinder+effective+communication+pdf
    • http://files.shannonsun.com/uploads/1/3/1/3/131398362/fupoxiganigepuroreku.pdf
    • http://files.spectrumradiopettswood.com/uploads/1/3/0/7/130739524/7073269.pdf
    • http://xagona.heroesasylum.com/uploads/1/3/1/4/131453494/jaxosivadizexem-vejebi-zubigatewi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/momurunok.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/interview_questions_and_answers_for_marketing_job.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/dibabitewojatakot.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/63269154894.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/nmls_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/ars_poetica_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/wadegiwexotasoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/73067551309.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/42713126783.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/tau_codex_warhammer_40k_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/fungi_identification_guide.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_off000068f1.bin
b15f3f16d4096cca12aa9f784924a6cfe550f4d0732c3ed64454d49f64318679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F1 5412 bytes
font_01_sfnt_off00007b36.bin
2e94a72a83b2fe053346a2250639c5b839a5be97dde2060a8c38662286d54921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B36 9880 bytes

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