Malicious PDF — malware analysis report

Static analysis result for SHA-256 433d95dc3a105a54…

MALICIOUS

PDF

34.3 KB Created: 2020-11-01 05:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 21578bee6aefbaf4dce78259229e7e65 SHA-1: d7d5224cb7d5579bb2fc16c6611f0dea43aaa205 SHA-256: 433d95dc3a105a54c7612470cc8259221de35e76432025bded0a3c0c50278f0c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a 'comparative politics study guide'. This indicates a phishing or malware distribution attempt, likely leveraging a link farm to obscure the final destination. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.link/123?keyword=comparative+politics+study+guide In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/rodotijurelej_xadidekozakoxok_rolazatesekujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_5f9d1865332f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424027/normal_5f9781766f807.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/tadevewuju/11605989297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e8ce23-ca04-4dba-aa37-aeec433ef361/mataku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa75895-4b1d-4c10-b2c2-f04c0b2abc4e/dry_under_eyes_remedy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524623a7-a2f1-4316-89ee-0b9e1e0bebf7/pretty_little_liars_jason.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f41bef-2de3-4951-993c-8d070bc07fac/mat_foundation_design_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9fc290-fc7f-4ec6-861b-0109b4cbfa49/razik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a3b926-1228-4156-a05e-05211f437d8d/69717997957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4f007af-e427-4425-9a77-a9d487c334fe/physics_lab_manual_class_11_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/alpine_cda_105_bluetooth_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/logic_gates_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3d08cf-bd4e-4689-bec1-ba46b09effa1/les_miserables_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd42c5b4-9c33-4f94-ad58-caf91b6ae5f8/30739829593.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_off0000488f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x488F 5460 bytes
SHA-256: 0fd2c6630cc16c333f888aabd98d94fdbe67668e16af343d627985fdcc1d092b
font_01_sfnt_off00005b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 9760 bytes
SHA-256: 1bc9dd8b6f6cf3376cca0018105cb48234925c7d98f55adf007eaffe7b9d6266

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