Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef3c6a5b6548059…

MALICIOUS

PDF

38.5 KB Created: 2020-08-24 09:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6e2ec5ba06f1e1e1ac51994ebcc1106 SHA-1: 38b5aa014f9b9b978a3cb94d9953ae26d5a5017f SHA-256: 6ef3c6a5b6548059391a419c8776195783d533e11911668b3eef3aac90e7d07e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract users with SEO-optimized titles. This suggests a phishing or scam attempt, likely using the links to deliver a secondary payload or redirect to a malicious site.

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=choreographic+forms+meaning In PDF document text
    • http://zajura.amythecrittersitter.com/uploads/1/3/0/7/130776737/nerusebudigen.pdfIn PDF document text
    • http://rotada.deinehandwerker.ch/uploads/1/3/0/7/130740062/61c0f507.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/1/0430/7759/9383/files/cambio_climatico_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/liwaxaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/blockhaus_stuttgart_speisekarte.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/anonimo_veneziano_stelvio_cipriani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/algebra_1_eoc_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/83163086662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/ketobafevuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/23948769678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/arrhythmia_book.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 1

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_off00005935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5935 5304 bytes
SHA-256: 7224bf88a00848cf94101d8a3349e15e2917ec07eb126d3f9bfe35fb7dccd00f
font_01_sfnt_off00006b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B23 10192 bytes
SHA-256: e7ceda5bcfed6bbc046ad8340611066954938be010f5b2df28e5538fba0b0783

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