Malicious PDF — malware analysis report

Static analysis result for SHA-256 169c787fbfedf09d…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 05:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bcabc61342634ccfcc64f6bad5a2b3c8 SHA-1: b93dc82e1b0ece62c7a94d54a88ea143184f6b43 SHA-256: 169c787fbfedf09dd5bd1d16418705d5c73079f9083092ccd23c15dee25ad593
214 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector infrastructure, suggesting a link farm or SEO scam designed to drive traffic to malicious sites. The document body, though obfuscated, contains a URL that matches the redirector heuristic, indicating a deliberate attempt to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=metallurgy%20for%20non%20metallurgist%20pdf In PDF document text
    • http://files.realtorblogging101.com/uploads/1/3/2/6/132680908/9176474.pdfIn PDF document text
    • http://files.fastbirthcertificates.com/uploads/1/3/2/6/132682892/ladajin.pdfIn PDF document text
    • http://wulasa.mrwisner.com/uploads/1/3/1/3/131378950/4ceadb6808.pdfIn PDF document text
    • http://files.rollepodiatry.co.uk/uploads/1/3/0/8/130874585/e09b5de7bb0.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/1/0438/1048/8477/files/susedelagobefafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/luxibakibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/nebupug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/capites_de_areia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/94725765237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/demand_definition_economics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/bevonafupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/57628641686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/87913766977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/siete_canciones_populares_espaolas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/pebomuzipesamidal.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_off0000591a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x591A 5468 bytes
SHA-256: 1baab41b690e2051c55d839dcea08895e1a42d12ca7ddeb7401fed2bebf6879f
font_01_sfnt_off00006bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB5 10712 bytes
SHA-256: cb27bc79da435f2ca0348747511860597a81dd7bf09c8f81719b452abaf66216

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