Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e87fff90c26f63f…

MALICIOUS

PDF

42.8 KB Created: 2020-11-01 07:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fbbf23ac3e01ed3a2c3f3a45c01673d9 SHA-1: dae32b0c81199c6308016e7a6f8bd6cafe0137c5 SHA-256: 9e87fff90c26f63fae4170638f5bc1965858ad71495f67982b56c6afb53a8d98
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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=fundamentals+of+pathology+pathoma+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5f9e38763995c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f9e251fe42f5.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/de0614e3-2566-45ed-93db-d4d77ef4d7e5/bass_pro_return_policy_on_rods.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/black_lava_lamp_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/haynes_manual_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/32297004933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5c4a8d-47f8-4448-b388-a29ec44fc494/lifajubafa.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/house_of_versace_podcast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53118cfc-40c5-4e5d-94f4-a14e88ed5bb2/37442633457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c425b5e-5bf6-4fa0-a4e6-9c50bf48836e/tupuxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e21bb5-3425-47f5-9b97-0bc425d7c708/tokujibatikaputipajafatib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1885ec1d-e4d8-46e9-9478-c78cd4354810/69999269168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8856df91-538f-4b4d-ac92-943d19ad10de/46923548986.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/bangkok_train_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8866f639-a1eb-4606-b633-3ad5b496f1c1/bogowefonikawan.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_off00006868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 5604 bytes
SHA-256: f3a08dda4c01f039dd96f6e957c06b469d1aa090f2447e11e3e1e44b473a601c
font_01_sfnt_off00007b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B65 10044 bytes
SHA-256: a313590a9ebe43de8d61544c487d1e17b604ea357a1c9eb7e6e8e3e4fa49694c

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