Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f97f7a89d28d32…

MALICIOUS

PDF

46.6 KB Created: 2020-11-03 01:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8b90c776226744dd4ca33d160767a502 SHA-1: d9a8d36919a9b19b55133b8269c5c53f60a2df09 SHA-256: 24f97f7a89d28d322cf40b22e8dc0a52687f984af7a318d38e850844916a16f2
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.me/123?keyword=kanye+west+psychoanalysis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f961bac9e0f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5d76ead2-a0eb-497a-a4a6-e66d8842021b/niliwegemarawaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65e1576-9a4f-4596-a20e-fb4459c6a47a/82561443452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f389797-d39d-4d9a-b8aa-7adb7083f8c7/76779400360.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/proceso_de_investigacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e582ca-0a63-4745-a865-96e53466d604/nojobasozezas.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/33367677393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ed49c9-160d-4868-b7a4-2ef998a26e7d/gramatica_espa_c3_b1olac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe227e23-00f0-40c6-b93b-95383758c462/partes_del_juicio_contencioso_admini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03300ccc-601c-4314-908a-74c8a31e9b9d/burozepadifomila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28008f3e-5d2d-4d19-bc20-9862fa8edca3/26313010232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f2e788-0fbf-492d-a7ee-5611fbc21d18/xoran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28535270-f316-42f1-a76e-22fac30c645d/black_and_decker_lithium_hand_vacuum_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757705b7-d10d-4d0a-8caf-1008fe1e66ee/22092913167.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/lesson_1_homework_5.2_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E2 4876 bytes
SHA-256: 1450988e35f3d9c8f9bcf34434955d516fb91b5391d1b5b82f5c39323c573912
font_01_sfnt_off00007a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 10824 bytes
SHA-256: 92147c67b79d0c88f333c238fc644f1861e16ab8ad9d22304ddd73d6fcbd5772
font_02_sfnt_off00009f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F9C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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