Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59b9b676a95fac3…

MALICIOUS

PDF

45.5 KB Created: 2020-11-02 10:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4b5722bebbe592046f5dd4510cb2bd0c SHA-1: 1d8aeee906175418fb672ad6631b61d36dde6ca6 SHA-256: a59b9b676a95fac31c713279faf15caba4211cb50007eec62e782d15ea2fd254
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable hosting services and redirector domains, indicating a link farm designed to distribute malicious content. The primary lure appears to be a guide on pairing AirPods, with a prominent link directing to 'ttraff.me', a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.me/123?keyword=how+to+manually+pair+airpod+pro In PDF document text
    • https://dujezokedibu.weebly.com/uploads/1/3/4/3/134392169/kupox-balilonemor.pdfIn PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/8933592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5f9e581fa1b37.pdfIn PDF document text
    • https://dujibirarikow.weebly.com/uploads/1/3/4/3/134321406/3064292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f898591ef6b7.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/dumizu_sarigi.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/7946801.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/vidabudivodeduwokobu.pdfIn 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/waxapoz/mario_kart_super_circuit_rom_hacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34767aff-87e3-462a-84d6-aae149071595/99836108546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f852bf7a-40ea-49db-9c18-badbb0d1ca9f/pifiwajanetipeg.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_off00006742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 4848 bytes
SHA-256: b6d15fa79e8460356d8bc3f426ff80be25d376dc74f3770c2ee5cd7d2057ceac
font_01_sfnt_off000077a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A0 10544 bytes
SHA-256: 6f02a550544b5191fb827764dd51c220bc287cd64d91b03f2097c0eb3570cd54
font_02_sfnt_off00009b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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