Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ff2b763b2bb992…

MALICIOUS

PDF

40.1 KB Created: 2020-08-14 09:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee31ab8514acde6f265e79ebd7695fcb SHA-1: c33d7c8690a6950565efb7c306663e9fd92bbff7 SHA-256: d8ff2b763b2bb992c7ea6b220c17bfb66f31e6b6bf0210d151c531b6ddc58def
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to `ttraff.ru`, identified as a malicious redirector. This suggests the document is part of a link farm designed to obscure the ultimate destination, likely a phishing site or malware download server. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=partituras%20cristianas%20para%20bajo%20pdf In PDF document text
    • http://files.bikeacces.com/uploads/1/3/1/4/131453005/luxijovewi.pdfIn PDF document text
    • http://fatikaj.diamondlodge83.com/uploads/1/3/0/9/130969742/2381517.pdfIn PDF document text
    • http://files.thewindisfree.co.uk/uploads/1/3/1/4/131453114/5356475.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/1/0430/9696/5269/files/bsc_physics_2nd_semester_question_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/31206706439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/logo_quiz_8_level_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9494/0575/files/mesema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/15756135830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/vawasoxogul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/48688341246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/descriptive_adjectives_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/55247651746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/jemamatojevogafuxujetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0008/6180/files/28368793322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/56553305325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/pigamerekaziluvalemulugog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/xolejudezijugusakerefe.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 2

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_off00005d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8B 5332 bytes
SHA-256: a7f19eb1d738996fdd959af0852214247a96415314ecc779323e34ebdf12dc0f
font_01_sfnt_off00006fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAD 10528 bytes
SHA-256: b9c20fc7fa87e7ef9001114e71566e6e48bfaf2451c17f896a290af1e89957aa

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