Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aec8eced4f8c1db…

MALICIOUS

PDF

39.9 KB Created: 2020-08-15 01:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6708edd0b038b59d97898ffd733f228 SHA-1: a20ee81c30b93451c6260e79017b1027d0a67a23 SHA-256: 5aec8eced4f8c1dbe0a20ff8f64b4e15d31bc1cad2e524a9713f0f6357594cb2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which point to a redirector service known for malicious activity. The document body text, though obfuscated, includes a URL that appears to be a lure for discounted Nokia Android mobiles, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector reinforces this assessment.

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.com/pify?keyword=nokia+android+mobiles+below+50000 In PDF document text
    • http://files.robertsheraldicknights.com/uploads/1/3/2/6/132681887/vefej.pdfIn PDF document text
    • http://files.aeropm.net/uploads/1/3/0/8/130814043/deduzosuko.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/1/0440/2357/8774/files/sr_71_blackbird_fact_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/sidemen_book_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6284/1759/files/el_cristo_viviente_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/biological_science_freeman_7th_edition_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/pabugugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/electric_circuits_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/45121248709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5103/0430/files/93503282408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/76924495626.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 2

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_off00005d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6D 5500 bytes
SHA-256: 0bbf78f4ff5d81134110be8c31c000bec8e13cba5aca0ab8d642c75fc75ceb8c
font_01_sfnt_off00007020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7020 10300 bytes
SHA-256: b086c576fc4c3119ff6072e4ae318f10fc83655a109f4ec60e3836dd67e80833

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