Malicious PDF — malware analysis report

Static analysis result for SHA-256 85769b70ccff94cc…

MALICIOUS

PDF

32.8 KB Created: 2020-11-09 07:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 99615561b30df7f1e2fa6a9d4f6e3cb9 SHA-1: ea906709e7929bba2e8e857ccc1347c963c731a8 SHA-256: 85769b70ccff94ccbd343bd7d20324757fd262447995941350b88675789efc7e
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?keyword=massage+oasis+sd'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

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://cctraff.ru/123?keyword=massage+oasis+sd In PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/c7c8f72a3e99e.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/dipuxedew.pdfIn PDF document text
    • https://kizilezena.weebly.com/uploads/1/3/4/3/134354573/84615fff0.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/d0e73e.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/e2f4db84-099e-4a50-82fd-a4a6e5f1b425/dumonu.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/rineferijokibanet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21774956-a68f-4f60-906d-ceb28606aa4f/55860046443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36402b53-606d-452c-8035-52ba67fb5a8e/madufiforirugufimasemi.pdfIn PDF document text
    • https://s3.amazonaws.com/nolomuxuma/watch_iron_man_2_putlockers.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/bugulodizevaxorabopif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5dc4ec-b622-47fb-863f-4221d4df6699/81705766670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba72d781-d6a9-4af6-a289-50e1850b6ae8/bf200_transistor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/80359066860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3ceff4-6f29-40e8-a848-549b977144b2/busukowoxadar.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_off00004341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4341 4872 bytes
SHA-256: 739b0b0634693fdb370329e44d0b667c7ac7759f6e545a85a14635f6e0795c1b
font_01_sfnt_off000053f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53F0 10176 bytes
SHA-256: eb79844bcd04b27d3c463f7fb67f0abcc4d77c763d1fa2a9ea01884d6e2aac25

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