Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc067f70c70ab08…

MALICIOUS

PDF

42.2 KB Created: 2020-10-27 17:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6e43c20fcc74049404733b4fc9f52797 SHA-1: 1b2033a090dffddeef7dd71af848cd0adeca8e2c SHA-256: 2cc067f70c70ab08c905f597b7330208dd4a1c595ecbe37cf7ca1ed7e2a1d4e1
94 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/123?keyword=loans+contracted+in+the+public+sphere'. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to URLs and the primary malicious URL is clearly identified.

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.com/123?keyword=loans+contracted+in+the+public+sphere In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f95bbc4abe1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f964b42225d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8c0759b986a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f9386a1e9cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f89e9df3232e.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/3403e8a9-d29b-48d4-9c3b-62984b2e62db/lefiroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe339b6-5dad-4cf3-919a-3f38fa8083b3/tifojagibugiwipej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44316af-bcba-418a-b32a-08180c0fef74/10949577101.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/mmoire_architecture_bioclimatique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721cc825-525d-48b6-aa37-86509c85929f/walter_savitch._absolute_c_._6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269e0931-f754-4340-881f-9f32491d3ca3/43633875060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6daeb44b-aec2-405d-a375-eea15625f972/geziwatepejevel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d43759-799d-4dce-b986-d79c4a9a52ca/solupelodopifalonenavexaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e34170-17d3-44b4-9a65-5ae494a5ce98/78581650760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d5cd4e-b2e3-4776-9db7-91c5f54fde3b/89395542603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7471ce-2bd4-45a5-b21f-5d25637323b9/94462836590.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_off00006447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 5240 bytes
SHA-256: 4c5eff95c00d73840260fca867e91a9d0c95e476f79b43b8e68581938898d632
font_01_sfnt_off0000760b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 10984 bytes
SHA-256: 2680d040ba53d87b768db516395abf06edb3ac331a8893d6f784e7ad6fe17dbf

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