Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ec3d9b1c864509…

MALICIOUS

PDF

42.6 KB Created: 2020-08-08 14:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ace65d3984ffd478b048b31c3eeb9a3 SHA-1: e47d535d5c90064f27510977dcb44a46099f8272 SHA-256: a4ec3d9b1c864509ee963b97ec7a7ba79de48bc32cc4a068991b1d99e285b4cd
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known to host malicious content. The document body and heuristics indicate a lure for free downloads, specifically referencing a book title to appear legitimate. The primary redirector URL is https://ttraff.com/pify?keyword=george+orwell+keep+the+aspidistra+flying+pdf, which is a critical finding.

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=george+orwell+keep+the+aspidistra+flying+pdf In PDF document text
    • http://kekegasa.albertadeer.com/uploads/1/3/1/6/131606186/c0a8f9.pdfIn PDF document text
    • http://files.supportrealheroes.com/uploads/1/3/1/8/131858287/vemofo.pdfIn PDF document text
    • http://files.virtus.hu/uploads/1/3/1/4/131437823/f6d0aeb6e.pdfIn PDF document text
    • http://files.cantonguitarsociety.org/uploads/1/3/1/8/131871593/sapapufopeto.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/1/0433/7795/0870/files/ladinubigexugen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/ximozevasixonazolosamefun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/jatitojum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1141/3915/files/ledivujazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/blank_sheet_music_notebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/blackfathom_deeps_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/membrane_structure_pogil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/plural_form_of_nouns_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/jikewilijawejezofixuvebak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/traitement_de_surface_aluminium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/73790198250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/julazujebilusokimo.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 4

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_off00006815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 5592 bytes
SHA-256: 2879e05fbd7a2d6abd21f1c352e9d988445aa471dfa426843334f3ac2f758d9c
font_01_sfnt_off00007b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B37 9988 bytes
SHA-256: 21478cf55d6a0fbc4275c51c3896b0fdc10cdd6739e72d8bd4a41475195c9aaa

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