Malicious PDF — malware analysis report

Static analysis result for SHA-256 034f2392c3bac49b…

MALICIOUS

PDF

35.0 KB Created: 2020-07-09 07:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 4b712ae1fcae61d10142ca181f0879a7 SHA-1: 5c399b23fcd69eded5cee53cf34c6732d8ab3100 SHA-256: 034f2392c3bac49b09d0ea0eb83c516e5f315f45313e9cdb3dacef320294bbcf
244 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating it functions as a dropper. It contains a large number of embedded links, many pointing to disposable hosting, and one critical redirector link to 'ttraff.ru'. The document's structure and embedded links suggest it is designed to redirect users to malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-9220366-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9220366-0
  • 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.ru/wb?keyword=daily%20math%20practice%20grade%204%20pdf In PDF document text
    • http://files.nlg-pros.com/uploads/1/3/0/9/130969910/katixiratowapo.pdfIn PDF document text
    • http://files.mi-sheffield.com/uploads/1/3/1/6/131606368/niludavifek_rerodotite.pdfIn PDF document text
    • http://files.jackblairgray.com/uploads/1/3/1/3/131384018/eede518175.pdfIn PDF document text
    • http://files.saradps.com/uploads/1/3/2/7/132740545/mejurigumamiba.pdfIn PDF document text
    • http://files.mxsnot.com/uploads/1/3/0/7/130775371/badakolizaxikit-xezodeti-tajexirumogum.pdfIn PDF document text
    • http://files.1210photography.com/uploads/1/3/2/8/132814967/veruxova_zirugo.pdfIn PDF document text
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fesopalom.files.wordpress.com/2020/06/welufovevi.pdfIn PDF document text
    • https://gipugof.files.wordpress.com/2020/06/97787471128.pdfIn PDF document text
    • https://xobowirali.files.wordpress.com/2020/07/82640267614.pdfIn PDF document text
    • https://jejiwivu.files.wordpress.com/2020/07/rezumeroredubotep.pdfIn PDF document text
    • https://zopowozofoje.files.wordpress.com/2020/06/6678237513.pdfIn PDF document text
    • https://dijeduzibug.files.wordpress.com/2020/06/15627486792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D93 5152 bytes
SHA-256: ca10152e81580e24047e44f18b47e40a5e03230bfe7a195292afbd23f0e29d1b
font_01_sfnt_off00005f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 9372 bytes
SHA-256: 3206b5ec04d9c82edf02ffdbaca127a73141de1cc8f5d5424e788027a272f494

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