Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc67fe7e4ce9b29…

MALICIOUS

PDF

50.9 KB Created: 2020-08-11 11:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98f30e884fdd1d4905a898074538846e SHA-1: 6726ec175fcac4789bc289da4de8cbf1c5792f0a SHA-256: cfc67fe7e4ce9b29631217f53319ba03c26e9083cad6259d5bafd9ef5bcf9dc8
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.com', are indicative of a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the primary malicious URL.

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=2d+array+c+pdf In PDF document text
    • http://files.karenhk.com/uploads/1/3/2/6/132680955/dodemebazefukuwewel.pdfIn PDF document text
    • http://files.staytrue2yourself.com/uploads/1/3/1/4/131453384/107918.pdfIn PDF document text
    • http://files.realwomenrealjewelry.com/uploads/1/3/2/6/132681494/4834819.pdfIn PDF document text
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.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/1/0428/9835/8432/files/71062637782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/cahier_de_charge_pour_site_web.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/xuwumezebokajadimepit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/33047534167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/mukijijojuwobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/finnegan_neonatal_abstinence_scoring_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5770/9210/files/antidiabetic_drug_interactions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/reducing_and_non_reducing_sugars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/lijabetimuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/arteri_perifer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/wamowawuguxavuxik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/coordinate_geometry_class_10_ncert.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_off00007e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E27 5076 bytes
SHA-256: f86c72f84f009fc191a4d950ec5ddcd01fb5897d2cba6bb5f7c2c49d4bf39e71
font_01_sfnt_off00008f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7B 15160 bytes
SHA-256: c9fe13cbbfbac86200fd05dfa9e343c6c5cf3d6b37bce6f5bd2560babe6cfbb7

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