Malicious PDF — malware analysis report

Static analysis result for SHA-256 465a53102fe75c6f…

MALICIOUS

PDF

54.0 KB Created: 2020-11-03 22:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 91b7290c862738fea474ae52473c828f SHA-1: 0a567cd82eb985669dafb02362ceb83c220834db SHA-256: 465a53102fe75c6f01d461a6c259a257803f355578ff2c7ea90b5be2449c59c1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/123?keyword=titanium+tv+apk+for+kindle+fire'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to external PDF files, likely for SEO manipulation to attract search engine traffic.

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://cctraff.ru/123?keyword=titanium+tv+apk+for+kindle+fire In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_5f994072d70b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5f8e9cb2e918c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5fa0518fb16ea.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/3576377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f9f67b9b1976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5f9d60a8e2b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f875b140f1ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/333c51b3-735d-482d-baca-c8fcca96e1e8/saluzujelutogel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0217/0008/files/16034079650.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/can_i_return_baby_formula_to_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/tipovimub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b0c501-1afd-42b1-b00c-c334481c3373/les_nombres_jusquau_milliard_cm1_valuation.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/81880909602.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a527.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA527 22264 bytes
SHA-256: e223dd700ae6bdc6df92cb00312c8f73e080001e6d840b413ec61aae9975040f
font_00_sfnt_off00006f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9D 5080 bytes
SHA-256: f4c524b76bec3189c1e5e8489076ef42df1715f42569b5256b7fba2ceda6ff44
font_01_sfnt_off000080df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DF 10604 bytes
SHA-256: 2554a621c6c251c912d836c7ccc646ed15db364274a0565c1ba300206445f0fc

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