Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1b50cdfcac63b6…

MALICIOUS

PDF

36.4 KB Created: 2020-08-12 15:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ee9535550797fbee64845eedfe7c892 SHA-1: f1b3f10da18f0f0f379fd0fb02823faad93fe8c2 SHA-256: 5e1b50cdfcac63b66d9fb501c22b5711fe326caf5f4a774fd8155660e165a953
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL is https://ttraff.cc/pify?keyword=biostatistics+pdf+notes, which is flagged as malicious. This suggests the document is part of a link farm or SEO manipulation scheme to drive traffic to potentially harmful sites.

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=biostatistics+pdf+notes In PDF document text
    • http://files.eygbball.com/uploads/1/3/1/6/131607467/b9d3217.pdfIn PDF document text
    • http://ralepij.saintgeorgechurchok.org/uploads/1/3/0/8/130874359/tixuxanesal.pdfIn PDF document text
    • http://files.christopherlewis.net/uploads/1/3/1/3/131398291/5301a9dc7f56310.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/1/0431/2514/5760/files/vekulizimegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/44574425914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5354/6656/files/revista_natura_ciclo_15_2020_argentina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/guia_para_aprender_espanhol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/zekaxojekibivuses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/cambridge_international_dictionary_of_phrasal_verbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/95596516571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/92999971458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/gamunoxubijimajowujodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/linitinexomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/87549540928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/13591276092.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 7

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_off000050dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DC 5072 bytes
SHA-256: 8ce8bb045ed0e61908fb9895828e13c8f4ef310c8e2af3731c32bbbdccc2ee64
font_01_sfnt_off0000622d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 10716 bytes
SHA-256: 8e8620905ac14f9a3352ff6ccd3d97b0fe961e945cec70b31fb28eb43a19d1ed

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