Malicious PDF — malware analysis report

Static analysis result for SHA-256 6525280799f600bc…

MALICIOUS

PDF

35.0 KB Created: 2020-08-15 06:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c887e2b49ea11e39cea39006712544b SHA-1: 2bbf720f5c358dc6571ad354d70c3c5e7030f8af SHA-256: 6525280799f600bc9c7d784a70caa8ed1ede7102a5adc35ee7d917b4f600675b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body and heuristics suggest a lure related to a "Scotsman guide logo" and a large number of external PDF links, indicative of an SEO link farm or phishing 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.ru/pify?keyword=scotsman+guide+logo In PDF document text
    • http://files.mary-jomurphy.com/uploads/1/3/0/8/130873830/wojirubesulitugeka.pdfIn PDF document text
    • http://files.bullengarookadultriders.com/uploads/1/3/2/6/132681596/fomapofegaro-wopigadazodup-zevevamer-tirexilagenizo.pdfIn PDF document text
    • http://files.foodfixations.com/uploads/1/3/1/4/131437402/keruka.pdfIn PDF document text
    • http://files.theforest.co.in/uploads/1/3/0/7/130776485/futupitupetonesoko.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/1/0435/3412/3160/files/88082784876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2171/9959/files/vocabulary_worksheet_6th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/iluminacion_espiritual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/kofez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/36722047620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/40575907917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/lerevosusawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/design_patterns_explained_second_edition.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_off00004b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B74 5264 bytes
SHA-256: a140e4fd6ff4b75711fac530211fbc31b4a405d3c9be8e9379f519a600c4fa3b
font_01_sfnt_off00005d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D36 10012 bytes
SHA-256: 174f0bc4f654c6399ccde98c2c2cdd8735212119ac8395b03b4757da40efd31e

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