Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81dee5b88f807ee…

MALICIOUS

PDF

46.8 KB Created: 2020-08-13 22:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b787850c7eac1e976b94437a18b3c670 SHA-1: d997ef98773c3414c31e8fd7f1f3725a279ba694 SHA-256: b81dee5b88f807ee3f223b1d209225876984849f03596c73006591c23123976b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on various domains. This indicates a link farm or redirection attack designed to lead users to malicious 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.cc/pify?keyword=coffy+movie+parents+guide In PDF document text
    • http://kaxuzutez.pawneeil.net/uploads/1/3/1/6/131607240/vijoxufiratoraso.pdfIn PDF document text
    • http://files.reading-works.org/uploads/1/3/0/7/130775668/vamorobagix.pdfIn PDF document text
    • http://ramiwif.sadkaneaikidoschool.com/uploads/1/3/2/8/132815002/3949018.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/1/0433/7677/1224/files/41478992435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/bevoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/28910557364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/18132968081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/76986275145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2764/5095/files/mitosis_cell_cycle_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/90954034900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0976/9631/files/guardian_top_100_novels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/20793898176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3726/8900/files/periodontologia_clinica_carranza_9_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/approximation_algorithms_for_np_hard_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4708/7262/files/cracking_the_pm_interview_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/mass_effect_andromeda_annihilation.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 3

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_off0000774e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774E 5396 bytes
SHA-256: f5aeaa1b1b8e1084e32a2516047736f2d485543e2e3db706612046135bb16ed0
font_01_sfnt_off0000899e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899E 10652 bytes
SHA-256: 9ea22c3d46d3ae0640d5f247c58536b9249c23b53032c16c07ee669daa7f89d3

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