Malicious PDF — malware analysis report

Static analysis result for SHA-256 666e157a938af14e…

MALICIOUS

PDF

40.9 KB Created: 2020-08-08 06:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad45504ffeb782a1cf72c594da3904dd SHA-1: ef3d0aad095607e0c3d9252bf5e5d88806b04ab6 SHA-256: 666e157a938af14e62f38688e81d159353066f008895454537b2e9262827fabb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and benign-looking filenames, attempting to disguise its true intent.

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=character+reference+letter+for+child+custody+pdf In PDF document text
    • http://files.movingmedicineali.com/uploads/1/3/0/7/130776611/tiluvowufit_nejiritid_tomevimitewivav_werixef.pdfIn PDF document text
    • http://wibag.stannesbirmingham.com/uploads/1/3/0/7/130775219/fosufolovafig_fofufafemozaro.pdfIn PDF document text
    • http://files.himalayanadventures.net/uploads/1/3/0/7/130738614/9877161.pdfIn PDF document text
    • http://files.wauwatosabasketballclub.com/uploads/1/3/1/4/131453451/1059953.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/1/0429/7601/8585/files/c_random_number_in_range.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2109/1484/files/jasiwekebutese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/cbse_grade_12_maths_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/97254897342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/kobuxemolubavofixep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6465/6026/files/bobcat_operators_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/filsafat_agama_islam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3296/files/mogutagakikofog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/26875145969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/78503776173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/91793473441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/vefimigevujiri.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_off00006475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6475 5248 bytes
SHA-256: 020d8ad14bdf2c9c506407f081b3a6fd5e94bfc0e038ff5f896f124d73e047b0
font_01_sfnt_off0000764e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764E 9484 bytes
SHA-256: 3eb7fbc7f5d0d158b319324228e79d15a4e7dadb29ffcb0891a613059bd6d0d9

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