Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f660e0344bffcdb…

MALICIOUS

PDF

40.2 KB Created: 2020-11-02 22:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 66e2726cf44cca3d4f20a8cad70428a0 SHA-1: c5d029e9010c30a7fc4705bf2a7428069ef81bb5 SHA-256: 0f660e0344bffcdbc2f1747d05d96c32a44c0133d640f3a4d600d92a24f9bfca
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, ttraff.com. This indicates the document is likely part of a phishing or malware distribution campaign. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is a high-confidence indicator.

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=prefix+free+coding In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f9d215d43695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_5f91b6fd7c284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f926e615aaf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5f9a25a79c039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446374/normal_5f9fb8a56d5be.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/1355215b-56d4-4344-8ff6-059ae09e974c/rexavov.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/51196943471.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/apa_in_text_citation_practice_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa3cb4f-a9ff-4954-ba51-006402fb8a68/19249246475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b45da9-d769-4b7a-a9a2-16398b6ff17e/self_appraisal_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f584b349-6847-4d91-b500-df80f38774a7/marque_au_trident.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5529a2-4f36-4d8b-8c73-a9b6d2071acc/mupupuvinupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9118b267-f865-41bd-b70a-af0a745de5db/98594732310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a5f844-7fd6-4f9d-a9e8-26a16f266236/metric_conversion_worksheet_2_answer_key.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_off00005d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8D 4840 bytes
SHA-256: 7c7a5aeb9457e041b07064f689601a521f6a8ba45856d5218bdf230a824ea28f
font_01_sfnt_off00006e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1C 11260 bytes
SHA-256: b7efbc5091c02e66a0b63ebfa7ba9265f78761ebfb4186c7707caceaadb2fb8f

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