Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac9c4a6a2f0a301…

MALICIOUS

PDF

35.5 KB Created: 2020-11-03 01:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 53b54db802f65fb6adf657e1cdceb1c5 SHA-1: 0c370eb92eeef13acea7a2fe1df5521c497e3166 SHA-256: 9ac9c4a6a2f0a301482cc3eb39e569e962db230c01b1ed2e71512ff5edc994e0
94 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The embedded URL, https://ttraff.club/123?keyword=nigs+wisconsin+dells, is the primary indicator of malicious intent, likely leading to a phishing or malware download site. While no scripts were explicitly extracted, the nature of PDF redirects often involves JavaScript execution to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/123?keyword=nigs+wisconsin+dells In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f97251855ff9.pdfIn PDF document text
    • https://xifamosavujefiv.weebly.com/uploads/1/3/4/4/134457952/mepikoxafitajusuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5f98413b86414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5f8f293b0c36c.pdfIn PDF document text
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/dugezixadenane.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mulerux/dagulox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28088d7-4c8c-42e1-b499-040ec4d61f5e/ditech_mortgage_pay_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efe0fd3-6e13-41e3-86c9-65f322656ac4/69956852965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4493c163-0fe9-4997-853c-24d7ca43bbd9/wuxejegesego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8ce086-f667-4a0e-aea6-335a8d981726/ragazufemapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283ecd9a-747f-46e7-9da2-53dc23293303/93125160505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b88342-0886-45e3-9b6a-6073949f231c/25522148464.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/16898899520.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4B 4864 bytes
SHA-256: f50db06b72481c328c34c5ddc4e9b47dadf26f0821a3063e61d0ff0f1c895274
font_01_sfnt_off00005f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0C 10176 bytes
SHA-256: 0d8dc85593177462c0ce54324fd0cb8ea1b3ed3554b67f3a61f09006b745c08a

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