Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90cdbcc92d588f4…

MALICIOUS

PDF

38.3 KB Created: 2020-08-25 00:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: faa005a01a4c19fa5a2d958386b681a8 SHA-1: 3b7b5dcd45ef601a10a97813ca21c08c763804f5 SHA-256: c90cdbcc92d588f4178cf3a16b7062392ae1a20701a7048f8adfaabc0fce35f3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Injury report vikings' and the URL 'https://ttraff.ru/pify?keyword=injury+report+vikings', suggesting a lure related to an injury report. The presence of numerous links, including those hosted on Shopify and other domains, indicates a link farm strategy to distribute malicious content. 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/pify?keyword=injury+report+vikings In PDF document text
    • http://nutige.ilovebuttercups.com/uploads/1/3/2/8/132814930/8752506.pdfIn PDF document text
    • http://files.herbfire.com/uploads/1/3/2/6/132695575/4314310.pdfIn PDF document text
    • http://files.paulsumich.co.nz/uploads/1/3/1/3/131398547/tufegujak.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/1/0431/6318/9405/files/lowes_lincoln_ne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/arduino_projects_with_code_and_circuit_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/4674/7542/files/basin_street_blues_lead_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6236/1245/files/degunijupomekawezejid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/the_canterbury_tales_translated_by_nevill_coghill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4024/1829/files/glencoe_mcgraw-_hill_health_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/kovipokipunobamemibudula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5888/files/44308920995.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_off00005a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6C 4984 bytes
SHA-256: 0a8ade6d9ca2c461a2e39a83544a23cbd236e3af10ff0873aeeb11402821470d
font_01_sfnt_off00006b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 9852 bytes
SHA-256: 6edab2f14d76b58bb1759f0ed0b2b4c0c706b65035df2045efb30f842a5ab80a

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