Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f16a7e37627917…

MALICIOUS

PDF

57.1 KB Created: 2020-11-03 13:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 33a7801b5878e8f3c803c398c7ea2858 SHA-1: 1f0cbf121d4e9da50740bb9d3c9975b73f02dcd2 SHA-256: 77f16a7e37627917c623ff87226b1c70da90a5aa1eff0aa4832459d17beea54e
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://gettraff.ru/aws?keyword=calorimetry+lab+key In 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://s3.amazonaws.com/jixerubowi/beowulf_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7e1482-5ef2-464e-a4dc-0d9356506e9a/95265097169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68ef795-7fc6-4082-bab4-50002a7f7add/vapizajejimowagurevilov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e18a468-e913-4b3a-bebc-dfe0ff0835de/pmi_agile_practice_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424792a0-25e1-4134-a796-067ac9c0875b/98853478173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ca1178-a174-4972-b1c9-477d3afa6a0e/riven_vs_illaoi_kerios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e51cd69-05cb-4183-8fce-8367a208de2f/71805292759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9cca34-8ec6-4745-a445-f6d161cd49a5/4256252752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072a743c-73b6-40b3-ba18-5113ee3d1b7f/minecraft_pc_launcher_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4918e35-c863-46fe-8923-5a92c3e4953b/fevigad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06875d61-8cb3-42eb-a24d-1e2672632500/tilebafit.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_off000093c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C6 4664 bytes
SHA-256: 89a2b87209c9e529ef31db6177847de3b013ec1b400ab1765b20ce83f9d17784
font_01_sfnt_off0000a3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B0 11048 bytes
SHA-256: 926e7e5c73ddb5fe0e8316c29128c31e33f15ff3fd352a4c4f148dacb3927c1c
font_02_sfnt_off0000c972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC972 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34