Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04a849937ec6b7c…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 07:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1177dcad93bbfe5fb18616bd25eee6e5 SHA-1: e902528ebd32f346d72b74a628f9b960c997d3e2 SHA-256: a04a849937ec6b7c82017b3559be73480203b4eafdb50aeaf6b743b2984c1e46
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to other PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=concurrency+in+go+o+reilly+pdf', is identified as a malicious redirector. The presence of a mass link farm and a malicious redirector suggests the document is likely used for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

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=concurrency+in+go+o+reilly+pdf In PDF document text
    • http://files.dragoneyenovels.com/uploads/1/3/0/9/130969185/4540963.pdfIn PDF document text
    • http://files.thermosenselab.com/uploads/1/3/1/3/131384071/rofoxoduk.pdfIn PDF document text
    • http://files.mimisbooksandmore.com/uploads/1/3/1/4/131453061/4868271.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/1/0429/3348/5727/files/78636518105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1538/6774/files/baldur_s_gate_1_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9567/7346/files/reflection_and_refraction_of_plane_waves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/kabusokejifoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/zutafemudedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/17269419293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6937/2576/files/80675923710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/xisegitibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/54235139370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/35043511346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/pilasifugasowotinedur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/54430079539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/87652195703.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_off00006523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 4940 bytes
SHA-256: cd58edd29856de918fc0afd530c52dede1abfb76170850ef1b10a49fbf3d022b
font_01_sfnt_off0000760f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 14240 bytes
SHA-256: c7b50f68625bf0fecd95240b5518cb7abc374604a4ade1ab1aee78bde4d9f942

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