Malicious PDF — malware analysis report

Static analysis result for SHA-256 638630f669a6de40…

MALICIOUS

PDF

69.1 KB Created: 2020-08-26 23:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c64fa4a7ae8038b4e1339bbdf34a9bf6 SHA-1: 296417e7984f7abbbf585831e7e36b2ba20a3e76 SHA-256: 638630f669a6de40d439f4d4a650522c83066485c2818f33d94b71605a01066a
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical finding of a PDF redirector link. The embedded content, though heavily obfuscated, includes a URL that is also present in the heuristics and DOC BODY, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=2004+ford+ranger+factory+service+man In PDF document text
    • http://files.ayurvedabarcelona.eu/uploads/1/3/1/4/131408169/muxoxu.pdfIn PDF document text
    • http://files.healing-ginger.com/uploads/1/3/2/8/132815008/8127391.pdfIn PDF document text
    • http://kotalozud.rachaelsterlacephotography.com/uploads/1/3/0/7/130739720/6663ffc3d788.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/1/0432/0195/3952/files/financial_accountant_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/basketball_game_powerpoint_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/wobasukozivuzomitot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/aircraft_engine_design_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/algebraic_expressions_and_equations_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/lovozis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/48838867612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/aloha_oe_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0839/3379/files/free_math_worksheets_grade_7_geometry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/ritoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/lunobowaleraminikakid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73875000904.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 5

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_off0000c08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 5740 bytes
SHA-256: 1b5a7fdc43b9f22f3d662f36f18b135c65eab0ba1ab00a9d6b4b8569f6c10e8e
font_01_sfnt_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 16664 bytes
SHA-256: eda213c58083650275537eb5ecc6fc57d54f6f4f270f8cf726b5fb858b8586d2

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