Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce03f8ccd1a08d0…

MALICIOUS

PDF

34.9 KB Created: 2020-08-30 04:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46675eca9dc5760d072ddc1d0103d3a1 SHA-1: d557ffa937a99328fa9d82b949b32a8d12a40a46 SHA-256: 6ce03f8ccd1a08d00f9b3a475f8e49f023bdd25788e6d1051340516f392a8136
154 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple Shopify URLs and a primary malicious redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links suggests an attempt to redirect users to malicious infrastructure. The document body, though heavily corrupted, contains the malicious URL.

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.me/wix?keyword=sa%25C4%259Fl%25C4%25B1k+Ansiklopedisi+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/35302019093.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/apple_peel_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/pexopimixewu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/94210752580.pdf
    • https://static.usrfiles.com/ugd/10e3af_a39376bfd60f498390e8936a571bdc67.pdf
    • https://cdn.shopify.com/s/files/1/0459/8815/1458/files/deferred_financing_costs_on_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/anna_karinina_em_portugus.pdf
    • https://static.usrfiles.com/ugd/b8c837_99fe961d527c40e48348b34a240f6a04.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f07abd4e94e4775beff56f609c3000f.pdf
    • https://static.usrfiles.com/ugd/6908d7_5793f2d3fdc34ac99748e9a2e64b771d.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_off000046bd.bin
cbda4ed6eef44535f0fd68d1f4d82ea4ca906703a113223afc3d1bea2a237c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46BD 5452 bytes
font_01_sfnt_off0000595c.bin
46e3e951388cd6598ec7987784e771679209df23a7caf78114ecc7031794a5ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595C 11832 bytes

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