Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e4ae449229bc57…

MALICIOUS

PDF

119.3 KB Created: 2020-08-15 18:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e89a64dd4861cf42c498f1f79d9d187b SHA-1: 5fde2096ac33a5b862f03ed1b68de814b4e3df49 SHA-256: 87e4ae449229bc57f87b4c57107a37d366de9d5fbb3fa95c08cfc0fb8e9749ff
194 Risk Score

Malware Insights

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

The PDF contains numerous links to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics, suggesting a lure for users to click on it. The presence of many external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious 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.
  • 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=gre+synonyms+list+pdf In PDF document text
    • http://files.healthymindsinstitute.org/uploads/1/3/0/7/130775378/lakiv_kixenit.pdfIn PDF document text
    • http://files.txtsantacruz.com/uploads/1/3/1/3/131380616/deguwutazow.pdfIn PDF document text
    • http://files.1bsf.com/uploads/1/3/2/6/132696048/763c205de5c61.pdfIn PDF document text
    • http://files.pollination-project.org/uploads/1/3/2/7/132712093/9503835.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/1/0428/1715/9335/files/11812511376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/tosiderejuxekeridedelimur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/xexazivotalezikuwezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/american_museum_of_natural_history_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/enlace_covalente_no_polar_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/calculus_by_howard_anton_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7848/6933/files/foxiwofatev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/vitigosuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/arya_vysya_gotras.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 4

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_off00019a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A5E 5112 bytes
SHA-256: 6fe411af5e822e7d69bea7df6f72939128a39e5b2e7bd56d4c664250cf3744ea
font_01_sfnt_off0001abba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABBA 10704 bytes
SHA-256: 5dcf76a2c4d149792ffaed035e035a714d0e93fbf6c3095edd98edf6cc45e3e0

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