Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad423d60460c547c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-12 03:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71c0b77e5bf70abcab691e595703d1aa SHA-1: c2076bd6edf4bf83ea0a816b875429e361deb4d0 SHA-256: ad423d60460c547cee3f2baa1e5e433df33ecea2f52dc614802f88eb34dbb69c
194 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous links to other PDFs, many hosted on Shopify, and a primary redirector URL. This suggests a tactic to manipulate search engine results or phish for users seeking specific PDF content. The ML classifier strongly indicated maliciousness, and the presence of redirector links points to a malicious intent, likely to lead users to malicious sites or further malware. No scripts were extracted from this sample.

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.ru/pify?keyword=bestiario+anab%25C3%25B3lico+pdf+download In PDF document text
    • http://files.oleanbarbershopchorus.org/uploads/1/3/1/3/131380295/wedijelesopet.pdfIn PDF document text
    • http://files.regcakes.com/uploads/1/3/1/6/131606046/meretozibinijuw_senamugere.pdfIn PDF document text
    • http://kaxotiriz.laurelparkespta.com/uploads/1/3/2/6/132681670/53918599a29cfa1.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/1/0431/2272/0922/files/persona_5_throbbing_king_of_desire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1914/9216/files/fotisukopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/juvewuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/nowova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/learn_python_3_the_hard_way_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/beccaria_crime_and_punishment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/98789316834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/asteraceae_cladistics_and_classification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/delete_watermark_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9906/0376/files/61720683512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/wasisadexabijuximu.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_off0000697d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697D 5564 bytes
SHA-256: a24f5dbadb9a0ca26b7ae126d42f559b1c73065f38733307fa7bc7e382aaad87
font_01_sfnt_off00007c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C41 11188 bytes
SHA-256: 4c979655cdb3a9e22088d8505a33b077efeb79942de4bfa6a88faff119a34c56

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