Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5738aaac84fb103…

MALICIOUS

PDF

68.7 KB Created: 2020-08-17 15:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6321ccbc1e4fa14ebfeb54295e13629 SHA-1: 061aa722d06e433de1a6f513ef2a97aaa0ac0a7e SHA-256: e5738aaac84fb1035c0fa3bbf159ec3775eb86aab58468403d561b0eaa422b08
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that is disguised as a fantasy football cheat sheet. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=yahoo+fantasy+football+cheat+sheet+half+ppr In PDF document text
    • http://files.kingdomhandymangillette.com/uploads/1/3/1/4/131453124/cdaff080253f213.pdfIn PDF document text
    • http://files.idoflowers.net/uploads/1/3/1/4/131438059/5246234.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/1/0428/7728/8611/files/prova_de_auditor_fiscal_da_receita_federal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/93446149109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/11809349355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/gumubukabom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/barista_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9704/7718/files/suxidetef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8191/5802/files/kazowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/nec_dt400_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/buvamovapomoterudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/nesolajomutafijezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3032/2084/files/download_the_value_proposition_canvas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/kefifeminebekebitopuxesuv.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 4

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_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 5308 bytes
SHA-256: 563b4339021690c5df8efe5e16ff8c8d001f03e8a212fc5b503d8dc60fa3e152
font_01_sfnt_off0000df7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7F 11140 bytes
SHA-256: 3d0239088c8331b5328a555198d918f47a227c3e77af69a3030203ebf63940fa

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