Malicious PDF — malware analysis report

Static analysis result for SHA-256 4273fd314f24e0e1…

MALICIOUS

PDF

39.9 KB Created: 2020-08-25 19:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e54ad29e5a31d83613575fa5227a9bc SHA-1: 33d8b3d4ac11ea78daeaa9a3f805a7ce64d50948 SHA-256: 4273fd314f24e0e1530b9ae3f124656f9f62cf2c9e3047b44eec6b6f84a48b1c
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, hosting numerous links to other PDF documents, primarily on Shopify domains. One of these links, however, redirects to a known malicious URL, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=present+simple+tense+passive+voice+e In PDF document text
    • http://zulumun.jerichotownlibraryvt.org/uploads/1/3/0/7/130739602/buburepogeb.pdfIn PDF document text
    • http://files.therawcliffeschools.co.uk/uploads/1/3/1/4/131452741/a5068d4e8.pdfIn PDF document text
    • http://files.authormichelledgregory.com/uploads/1/3/1/4/131453028/zubesu_rebolumalato.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/1/0437/5655/2343/files/dutanilijejunarasusuziva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/pikolixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4415/9143/files/30562720054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/saxopaxipuvoxedax.pdfIn PDF document text
    • http://mokasib.jpetrovic.people.ua.edu/uploads/1/3/0/7/130775805/7e4535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/51962401791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/40142212888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/93423525354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/baxazosomaredajeder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/kingdom_hearts_2_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/51943590850.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_off00005ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 5140 bytes
SHA-256: 1f3bc3f635de8e4bf0e7600356cf051dfc5f5d4d4e020da4c4209ed468aa842d
font_01_sfnt_off00007053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7053 10044 bytes
SHA-256: 5be9d8baf4dc8c365b517165fa740f31f33297a28ca7d1fdffa53541373b1ffc

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