Malicious PDF — malware analysis report

Static analysis result for SHA-256 427c58e209520570…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 09:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b0db70671c31a4b14559fd9676a8057 SHA-1: dc949564b2778e01f5e94cb38bf65dc3148a7c19 SHA-256: 427c58e209520570ed55f03facc4dceb1a07266b619d85628d2db4a4e3fa253d
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily corrupted, appears to be a lure for a 'grade 11 college biology textbook pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file is classified as a malicious redirector due to its structure and the presence of the malicious URL.

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=grade+11+college+biology+textbook+pdf In PDF document text
    • http://files.fcbtlaw.com.au/uploads/1/3/1/4/131482962/fowixami_bebux_memukezemanejod_zubepasusotupo.pdfIn PDF document text
    • http://files.cmebenezer.com/uploads/1/3/1/4/131438418/9f054ceec2.pdfIn PDF document text
    • http://boxugeja.orovalleyexpress.com/uploads/1/3/1/6/131607062/349845.pdfIn PDF document text
    • http://files.clonmelchildcare.com/uploads/1/3/0/9/130969370/pidufudopidir-pusepaj-mamodoraxumo-panibobobim.pdfIn PDF document text
    • http://files.twoxtw.com/uploads/1/3/1/8/131871433/5470465.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/1/0431/3051/9716/files/28521532230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/jukekodikorubuwoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4619/7653/files/loketutasejom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/xolekobasisixumewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/12947063210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/defepofizewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/cambridge_igcse_and_o_level_business_studies_revision_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/denenikuluzatunodar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7345/3724/files/becoming_justice_blackmun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/63670980213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/bokufokovujasezopoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/biology_book_by_miller_and_levine.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_off00006374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 5600 bytes
SHA-256: 5800a64c438d6976b0bb6ee8df1c38ef4b6aa16d888d9c0656f8cdd016d3085b
font_01_sfnt_off000076b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B0 10348 bytes
SHA-256: 7b515e4b0085c45c8a66078f1fb9657494bdd354bece99bbc27dad49bf9a9521

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