Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fcb67020320433…

MALICIOUS

PDF

107.8 KB Created: 2020-09-30 20:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e04dcf93af93cefc59d3316bbc60ae42 SHA-1: ea0197815edca61f6c1e06c9129b8e2eb4688e84 SHA-256: d0fcb6702032043314f5c9fada65ee6113bf1dca62a6c49a4e646d3d6fad56e9
184 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to its extensive link farm, which includes a link to known malicious redirector infrastructure. The document's primary purpose appears to be SEO manipulation or user redirection, as evidenced by the numerous embedded URLs pointing to various disposable hosting domains. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent to lead users to harmful content.

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://gettraff.ru/strik?keyword=the+tempest+pdf+summary In PDF document text
    • http://files.profitorganics.net/uploads/1/3/1/6/131637219/rabezev_tinil_zikigutusapase.pdfIn PDF document text
    • http://suxizu.hrsjlifeteen.com/uploads/1/3/1/3/131398563/vebusiziwexi-mijudanufemeka-furidezat-jipibe.pdfIn PDF document text
    • http://files.educationistheway.com/uploads/1/3/1/1/131163920/8f2d41e846df2cb.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/sigimabenukokomiruxiw.pdfIn PDF document text
    • http://fujupe.beardedhero.org/uploads/1/3/1/4/131483400/togodudo.pdfIn PDF document text
    • http://files.vellumtattoo.co.uk/uploads/1/3/1/4/131406075/5944436.pdfIn PDF document text
    • http://files.ecimslilliesffp.com/uploads/1/3/1/6/131606480/ad834f422a.pdfIn PDF document text
    • http://vemule.restorationchurchag.org/uploads/1/3/1/4/131453574/a6dc2450eb74a26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/zawajalavifidupogidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6796/4580/files/80343279017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/sipilozemesesixejizixebaf.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_off00016bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BCE 5300 bytes
SHA-256: 8f8bd66afaf78ce5bd1c012c7c5c25e91718cc89bf8194c5327d36e628f65967
font_01_sfnt_off00017dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DAE 10844 bytes
SHA-256: 67d5bf80fe1673a3e85dabaad88173bffb95380dab4a25d964ed0bf732d2815d

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