Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3ed339af20af86…

MALICIOUS

PDF

72.8 KB Created: 2020-08-20 04:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c68648519a2dcd44d1d2ea343f845d96 SHA-1: eb9f5da54af9c725a81109f21efd13432ef8dfa6 SHA-256: 7a3ed339af20af8657a9222aac4ad757cc1542effc353528836f2236a72f13b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to 'Wernicke's encephalopathy treatment guidelines' and also includes the malicious URL, suggesting a lure for a phishing or malware distribution campaign. The presence of numerous Shopify-hosted PDF links further indicates a link farm used for SEO poisoning or to obscure the final malicious destination.

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.com/pify?keyword=wernicke%2527+s+encephalopathy+treatment+guidelines
    • http://files.bhesseandassociates.com/uploads/1/3/1/3/131380558/505780.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/tepovuges.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/the_celestine_prophecy_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/xojerodibozidut.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3081/files/mazubukariviputa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/attestation_urssaf_formation_professionnelle_continue.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/sword_art_online_15_alicization_invading.pdf
    • https://cdn.shopify.com/s/files/1/0432/8541/4056/files/ctet_december_2020_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/61958696264.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/30992081856.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0728/files/steam_client_bootstrapper.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/53261758020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0aa.bin
c7b72f5893d0d38bb285c04bc91f69a692fb22992bc6f3ecf51d157de52a453d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AA 5584 bytes
font_01_sfnt_off0000e388.bin
9ded1032a74d10cf8aea30232738a46022b865b3c8d7042cfc82a689aa2cc6f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 10576 bytes
font_02_sfnt_off00010799.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10799 4324 bytes

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