Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ff512bb9884680…

MALICIOUS

PDF

40.9 KB Created: 2020-11-02 13:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0cd4ba0581fc3da98acef9a8df05c10b SHA-1: ddccac113ab702e9e6cc675cfb498ed58c87a4cc SHA-256: 35ff512bb988468019da0e65e23c84407775a116284453f738c5770da7e2e39f
94 Risk Score

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.club/123?keyword=the+catholic+faith+handbook+for+youth+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5f9a2c41cf8de.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/84751b9d-ccad-4fb3-ac30-ac0c0a5ac018/54682714849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c0562d-1729-4e21-b176-02530f2e6d57/686_amibios_1999_motherboard_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9a8fdf-fae0-4d03-b858-e2c43aadf06b/wamib.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/ruxuxomupenofuwekepuvon.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/64791455170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3693c043-c844-4d45-b55c-c446529d7ad1/19935672604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79abf60e-180f-4fc2-83e2-6968d2ccc5d2/87659500182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b37d16d-407c-45f2-835d-2a149a928a44/padenulonimomokos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7082d8aa-5339-46f7-83bc-92963c0b4a7a/1-99_firemaking_guide_osrs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10b20e5-88f6-40da-9bfa-d5538f81a445/empty_timeline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/shelf_life_of_beer_bottles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abd82b7-df9a-4e79-ad27-546cb48b4a61/24819807444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ab183-f4d0-4ab3-a051-7273feee95f4/zonerexeguwotiboxinazupen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4525d8-96c0-4920-a21f-165600a9c432/67055700679.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_off00006036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6036 5320 bytes
SHA-256: 45dc6d026a69883bed5eb04217349149be2f5936fa24965cf7c3c97022f8b0c1
font_01_sfnt_off0000724f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724F 10560 bytes
SHA-256: a21411dd6a1819d508f78533a42178ddd04b0572a514c593b3ae89ce6519a6eb