Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76d2e80137a414f…

MALICIOUS

PDF

71.5 KB Created: 2020-11-05 01:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 38d0392e8bbe9d265b0b0d5c835a0580 SHA-1: 79cd3de193e38534fe0704823b07e7afd2cf8440 SHA-256: c76d2e80137a414f75b78690b24d827a7ab2a90291ebe443e7bb6e12c719dcfa
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/123?keyword=major+religions+in+brazil'. The ML classifier also flagged this PDF with high confidence. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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=major+religions+in+brazil In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f87e12224c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8700dda5834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fa337b0b123c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5f9fcb69ccb49.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/74c9e73f-b45a-4d2e-873c-5ac742bf2b38/kerudusowarigalad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85da802-f5b5-4c74-bc2d-00905a066af5/fetikaletexatejenobadilel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb00ea8-7949-495d-90b8-d74116f3923f/sin_of_greed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a44c53-a3f9-4ee8-bddd-eada21527946/tipos_de_drogas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f78f14-3d67-4c24-b57c-e92eb10e5689/92330005047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba337c8-861d-43be-9587-e3bb1781ba79/lonulogumugelarovulixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff31804-3e4a-4881-8ff3-d3e9c050dfbb/nonexokuzupetumupunodul.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/jatupukawitedaxeviniki.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/97588054066.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_off0000c988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 4832 bytes
SHA-256: fdc4dd871ad0b64c18af3c10de17a41453ba178aa689ca74d882c5e600185346
font_01_sfnt_off0000da05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 13116 bytes
SHA-256: 612bd46471abe58e59af8888da4babef3c5f8217a772137989ce8173c65609f8
font_02_sfnt_off000102eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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