Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bce1a8c511b362b…

MALICIOUS

PDF

45.9 KB Created: 2020-11-03 22:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1138d203451f9eec54f42b3876d74f97 SHA-1: d10b512cd1801f9abdd193e7b2689d5ba0717668 SHA-256: 1bce1a8c511b362b27e8d8bcbdc62a2bb35ecf2dfe08a34ac88ff6227e4b04a4
94 Risk Score

Malware Insights

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

The PDF file contains a prominent link that masquerades as a free download for popular media, a common social engineering tactic. This link, 'https://ttraff.link/123?keyword=download+naruto+shippuden+episodes+for+free', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this file is designed to lead users to harmful content.

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.link/123?keyword=download+naruto+shippuden+episodes+for+free
    • https://cdn-cms.f-static.net/uploads/4413838/normal_5f9f8e91ef1cc.pdf
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f94fed461e33.pdf
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/7116450.pdf
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5f933fffce495.pdf
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f9931519b73d.pdf
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/4198164.pdf
    • https://cdn-cms.f-static.net/uploads/4426690/normal_5f9d36598fbc8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/52dfd363-1abc-4521-806e-82c195098b53/67534291442.pdf
    • https://uploads.strikinglycdn.com/files/f390974d-bf67-4b35-8132-3dd159afd055/75033545109.pdf
    • https://uploads.strikinglycdn.com/files/c05c47af-b93d-4ff2-860d-820c09388c40/17584515964.pdf
    • https://uploads.strikinglycdn.com/files/08073668-bdcc-4bec-8630-d42ce393cbb7/que_es_una_imagen_virtual.pdf
    • https://uploads.strikinglycdn.com/files/61f873d2-8195-4471-815b-cfbd6a15b77a/jemimojupulaw.pdf
    • https://uploads.strikinglycdn.com/files/09965d44-b5e1-4532-a1c0-d8115287d9e9/highest_gas_prices_in_death_valley_california.pdf
    • https://uploads.strikinglycdn.com/files/21f7316c-9b35-4d15-9a2a-f53c588c5ada/el_capital_marx_y_engels.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007345.bin
35de72fd9f262b0413f1f9439835b368349a950bb4a79510ae3fefd2d60ff6a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7345 5220 bytes
font_01_sfnt_off0000851b.bin
1b30b110b8daf38b2a02d79cba448abdf7874241f29c7d3a39754ba44d0762bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x851B 10952 bytes