Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc40e105714e3ee…

MALICIOUS

PDF

48.6 KB Created: 2020-08-08 21:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 627253232b0a26a2a3592ad43b5fef5b SHA-1: 2f8f126f14ebb93de022bd9932163fdcecc682a1 SHA-256: 8dc40e105714e3ee56c44824b01e74b3170b15e3db219f8cc33a9ef2091769bc
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, masquerading as 'B. ed biological science notes pdf'. The primary link, https://ttraff.ru/pify?keyword=b.+ed+biological+science+notes+pdf, is identified as a malicious redirector. The document's structure suggests a link farm designed to drive traffic to potentially malicious sites, rather than providing legitimate content.

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=b.+ed+biological+science+notes+pdf In PDF document text
    • http://mimon.thelanguagegarden.net/uploads/1/3/1/4/131407089/0d5b17162f2b066.pdfIn PDF document text
    • http://files.miketheprinter.net/uploads/1/3/1/0/131070476/gunifovuporot.pdfIn PDF document text
    • http://zofesut.sanblasdreams.com/uploads/1/3/0/8/130814238/toruwopagode.pdfIn PDF document text
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdfIn PDF document text
    • http://files.match-gems.com/uploads/1/3/0/9/130969243/waruxe-gibotusupuwe-viputefetapaj-walugogigebomev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/wuxawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6473/7438/files/72174241108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/1524403692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/manual_para_aprender_ingles_para_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/bimekevusexopov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/25761578664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7892/4953/files/nofurozarafixuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/23727705221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/tevizit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/59626840539.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D56 5448 bytes
SHA-256: 0823a51f01b4a44b36e404917ffb6a250540d32dec53cf6502033f3ad973cc7a
font_01_sfnt_off00007ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 10076 bytes
SHA-256: 8bc01999b7af852a201d4338d6ec4d2738ac43e6a30c75a716f69e5d5e664052
font_02_sfnt_off0000a2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B5 5036 bytes
SHA-256: fc6addacc1e3a4532aed595d1b4e75ded13bdb1e113fff3015bd3faac9cea4eb

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