Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bc61fd5f462746…

MALICIOUS

PDF

36.6 KB Created: 2020-08-24 22:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3deb313bd20a3e725b60b0732a466c22 SHA-1: 49b33354f8415909d9e1855034a5b77caa0a06a5 SHA-256: 07bc61fd5f462746dcfa59176e79630f5ccfd2d11eab4d311ad3234e771d9e56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cv+template+word+photo
    • http://jatix.rebeccacarterbooks.com/uploads/1/3/0/8/130814328/fe8ad99db55a34.pdf
    • http://mewenuf.bobadneystudio.com/uploads/1/3/1/8/131856408/ffeaedda4f2ddae.pdf
    • http://wemifi.rosinakhan.com/uploads/1/3/1/0/131070197/mivisuzumurule_wakalolapeje_bonadoxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/80133673034.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/busabos_ng_palad.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4641/files/joindre_plusieurs_ensemble.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/danenarutomexorimu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/5589198406.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/68119276721.pdf
    • https://cdn.shopify.com/s/files/1/0465/4917/2382/files/chinatown_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/4644647656.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/3563573685.pdf
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/puzirawi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/wopejidaxibak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/gubibexozekitovusuwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/veterinary_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/sixadasogokojuzixoke.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005323.bin
8c82059afe0d8cb89b17b137476849d6f53dc85626d8b8b2cfb87a6a26ea040a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5323 5080 bytes
font_01_sfnt_off00006452.bin
9e19f4845e437bd465ff287ca25fbd9fb08b3bddc41de956a056c9d08deaf0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 9808 bytes

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