Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ded7639216ce379…

MALICIOUS

PDF

41.5 KB Created: 2020-11-05 07:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0643f577f9da255297ae1df7903819e3 SHA-1: 1d3de8bd351489d981e4a45890b6492b6342a460 SHA-256: 8ded7639216ce37928d2b19f8cc4c20acc8cd7d7c21495c3862f2d84ed9315ad
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=definition+for+collinear+points+in+geometry In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nuziwozonugof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f9399fe20c8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8713e47f82c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_5fa1944a8f9ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5fa1ff23ea082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f921209b2bde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/difference_between_parliamentary_and_presidential_form_of_government.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6227fd8b-a8c9-40b0-9f9d-1f9ca4f137d8/managerial_economics_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f863714-6d05-4f9f-acef-c363ea7ecfe4/dr_friedensohn_quincy_ma.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/29225052827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a47a96-9519-45f7-8368-d24c0b94e28c/interpreter_of_maladies_chapter_4_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529a6eba-49fe-4ec5-8868-db3ce49ee15f/netevivepedawuti.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/baixar_curso_de_ingles_em_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/hammer_candlestick_pattern.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_off000061a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 5436 bytes
SHA-256: eac8e71b28255c27f03a59f66b09a939ae1b2ec2af2b282f86d5df5ab46c4619
font_01_sfnt_off0000741b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 10904 bytes
SHA-256: 75ff57944ac6a7d522463468c960578d8b15b48c51ce2401b95e98ab56c7e75c