Malicious PDF — malware analysis report

Static analysis result for SHA-256 890c9a6cfdc4544c…

MALICIOUS

PDF

49.3 KB Created: 2020-08-24 21:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e75e30228a32a91327382084e0883cb SHA-1: 9f735cc186fe1a7c7cea8fecc64a301bce44b771 SHA-256: 890c9a6cfdc4544cbf8947c45d42784f9ca09e156b90b7522c42199af709ba4b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains text related to a 'cetane number improver report' and includes the malicious redirector URL, suggesting a phishing or scam lure. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=cetane+number+improver+report In PDF document text
    • http://gikizi.devinjamesbaldwin.com/uploads/1/3/0/8/130813592/lipenagezidi_nasigusi_filinarurej.pdfIn PDF document text
    • http://gudog.casadedios.us/uploads/1/3/1/4/131437850/xonovajogubukarasujo.pdfIn PDF document text
    • http://files.alexandrudina.com/uploads/1/3/0/7/130740124/donirugor-zukosilenav.pdfIn PDF document text
    • http://dekudofuv.novembercustoms.com/uploads/1/3/1/6/131636725/a97a2ab1c930a.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/1/0435/2062/2756/files/livro_apicultura_manejo_e_produtos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/lipujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/firawepafujefewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2994/8572/files/excel_dart_cricket_score_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/lodajuzezegetamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/86012586869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2383/4024/files/frost_and_sullivan_telematics_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/vixazut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3816/8472/files/korasudukurosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/73252899978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/68081153629.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 3

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_off000081eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 4860 bytes
SHA-256: 69d26367231256d15a222c086c9a7969ab8a60887302623bf4101205ed388b6e
font_01_sfnt_off00009258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9258 11128 bytes
SHA-256: 6c254dcbf651d854d64c7bc77f658a8e320515ecb246805b1b639fdfd2e18c0c

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