Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a2e3946b064c23…

MALICIOUS

PDF

39.4 KB Created: 2020-11-07 17:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1b8ea7302b2456bdd05970d29fe715e6 SHA-1: f54ca0ec04c9f2a6f07c916945935a1a183f980a SHA-256: 96a2e3946b064c2342d5415af98d3301bff3ff9cf8a40b72ab57e8980c414c25
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known redirectors. The primary link identified, 'https://traffine.ru/123?keyword=eero+pro+pdf+manual', is flagged as a malicious redirector. The document's structure and content suggest it is part of a link farm designed to manipulate search engine results or direct users to malicious sites.

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://traffine.ru/123?keyword=eero+pro+pdf+manual In PDF document text
    • https://xabejopoturidu.weebly.com/uploads/1/3/4/3/134352457/93c0a417f4f.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/3558536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_5f9d0450b987d.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/kikufilu.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/welibokatem-lomurujimejixu.pdfIn PDF document text
    • https://jobugatiponez.weebly.com/uploads/1/3/4/2/134234820/1852022c6614c37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dutoropibe.files.wordpress.com/2020/11/elements_compounds_and_mixtures_worksheet_answers_ils.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b70122da-fe50-4b53-b583-98d6c410dcec/gupukepiruzebara.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/29850722977.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/jagilidaro.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.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_off0000532d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532D 2960 bytes
SHA-256: d8ef148c594adba1946aa7d95f188f3f33f69c77bc22762a1a4a57bcfd89a796
font_01_sfnt_off00005daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 4964 bytes
SHA-256: 6ef8de8fd8fde4ef6ffdd6d7c1b0f34450aa9f08058d84c8faf477057ae862bd
font_02_sfnt_off00006e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7E 10168 bytes
SHA-256: 4f30abb00c96139d1888e65b1bd30465e3a3d215ad7bf55c2936da70f5b0270c

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