Malicious PDF — malware analysis report

Static analysis result for SHA-256 090aa245146f492d…

MALICIOUS

PDF

122.2 KB Created: 2020-08-05 08:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7bb0424254c756ebd85c2477fbe4c581 SHA-1: ceb77d05909dba6ef08293fb5e1d6b634f941990 SHA-256: 090aa245146f492db4c6fa24ea88c9e687d5b9dd0305476f01fca016399c057c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to a redirector URL (https://ttraff.ru/wb?keyword=stanley%20kubrick%20biografia%20pdf). This indicates a link farm strategy, likely intended to deceive search engines and users into visiting malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=stanley%20kubrick%20biografia%20pdf In PDF document text
    • http://files.devlindesignstudio.com/uploads/1/3/0/8/130814717/muzezoxofatir-vusuxedoxix.pdfIn PDF document text
    • http://files.bvcontracting.com/uploads/1/3/2/6/132683330/regaweruzirozofivodu.pdfIn PDF document text
    • http://files.winnebagocountyrta.org/uploads/1/3/1/6/131637419/1852490.pdfIn PDF document text
    • http://files.medfieldheightspto.com/uploads/1/3/1/0/131070190/joridesaz.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/1/0434/2431/7596/files/vasijafawezunup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/types_of_artificial_intelligence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/63826432283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/62291457611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/seven_deadly_sins_corey_taylor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/aberturas_de_xadrez_para_leigos_james_eade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/51367392534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/keras_vgg16_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/tewifadomofijovevuxafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/kirufolepetevoredafegevot.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_off00019955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19955 5552 bytes
SHA-256: 34808b660b2a516ff95979e6955b7237b61ab53825652737ac33d118c7d38d95
font_01_sfnt_off0001ac4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC4C 15296 bytes
SHA-256: 6092b591955f31cb642bb53edbc8d602634a1a2150cce095b6c3903be153fada

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