Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d45bdd42037ab2…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 05:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b4d256b17c39937caa1cca7ed3fe90 SHA-1: 710fb61432bc94483057b346d8abadf7d6ad752e SHA-256: 88d45bdd42037ab22e745d70c60b9cf865f6266583db00abdfb983d063b3d1f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to external PDF files. One of these links, https://ttraff.cc/pify?keyword=battletoads+double+dragon+nes, is known to lead to malicious redirector infrastructure. The document body contains garbled text and embedded URLs, suggesting an attempt to obscure the malicious nature of the links. The presence of numerous external links indicates a potential SEO manipulation or content hosting scheme, possibly to distribute further malicious payloads or phishing content.

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.cc/pify?keyword=battletoads+double+dragon+nes
    • http://files.4burlingtonwoods.com/uploads/1/3/0/7/130775866/duwizifenej.pdf
    • http://files.larkseverest.com/uploads/1/3/1/6/131606629/ef78be58dcc6d6.pdf
    • http://fesare.learningandbehavior.org/uploads/1/3/0/8/130873877/fevofukejege-benaxedowamo-ludekawufiki.pdf
    • http://files.dj-dogtraining.co.uk/uploads/1/3/2/6/132681438/2956953.pdf
    • http://texujikux.projectmaleprogram.net/uploads/1/3/1/0/131070420/vopasamonizuviki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/zetetic_astronomy_1881.pdf
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/voleluxiregeluwodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/7th_grade_math_equations_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/6172/1765/files/67498783288.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/xusetimunufojubadutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/agama_di_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/legevotovetowojaxegopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/wezes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9966/9151/files/moving_average_method_forecasting.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/43902745387.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/27099184764.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/beckman_coulter_access_2_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/rowikebaxam.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_off00006d76.bin
5d92142e985fad9ec11f8b31bf31dc8b7bd668248e27d4f6578100820e79a0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D76 5180 bytes
font_01_sfnt_off00007f1a.bin
d29180d5ed94604e066959d87805ca37534bc2aedf31203088fb6b3060d2d925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1A 10680 bytes

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