Malicious PDF — malware analysis report

Static analysis result for SHA-256 282642345e33cbef…

MALICIOUS

PDF

32.2 KB Created: 2020-08-01 13:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c2c4223b571df09f96ff07dbcf726e4 SHA-1: e5dea48f25bb646c2fcda858042bb00f31a28845 SHA-256: 282642345e33cbef3d4393cfc149a85e3624243be20d2a4279139919bb9d6e38
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'CBT nuggets torrent' and the primary malicious URL. The file also exhibits characteristics of a link farm, with numerous links pointing to external PDF files, likely to manipulate search engine results.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=cbt+nuggets+torrent In PDF document text
    • http://files.parrellohara.com/uploads/1/3/0/8/130814346/bupugefabalap-xewoduwunexajug-fuzuretijes.pdfIn PDF document text
    • http://files.meadowlynnfarms.com/uploads/1/3/1/6/131606563/bepebenud.pdfIn PDF document text
    • http://files.davisvilledetailing.com/uploads/1/3/2/6/132681336/fomek.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/1/0428/3177/3852/files/mosiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/hockenbury_psychology_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/birivifulesizuxilisovazej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/fepureze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/12201738232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/rimunelix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/98075896601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/initialize_arraylist_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67062005494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/14527968902.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 7

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_off000043a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43A5 4656 bytes
SHA-256: ed7d61fed7bf5a611f65a66137fba31de6680fb36f44f722d370c277429d7018
font_01_sfnt_off0000538a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x538A 9564 bytes
SHA-256: ad66eb5dfa396c1539c8a934c0687151642e2c082bb6354e3b28317acf17256c

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