Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d3236ce5f34a6a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-25 10:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e54a861f2d03438ee6eeb70bb4654b5e SHA-1: 31a01ca67a4fb5fe753b5031507fab696022aef4 SHA-256: 26d3236ce5f34a6aaa48d71273e25a8ce5a6c6fa0009810d511470bd579ee174
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it's an "establishment inspection report fda database" and includes the primary malicious URL. The ML classifier strongly supports the malicious verdict. The primary malicious URL is a redirector designed to lead users to further malicious content.

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=establishment+inspection+report+fda+database In PDF document text
    • http://files.kullsensei.com/uploads/1/3/1/4/131409009/1c68ffcd.pdfIn PDF document text
    • http://jopodew.dulcineaquartet.com/uploads/1/3/1/4/131408071/31561b339bcad.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/1/0445/8423/9268/files/search_text_layer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/erythromycin_ophthalmic_ointment_davis_drug_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/kabbalah_practica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8318/5819/files/dumilufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/33940425870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/famulogux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6918/3902/files/vomujojug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/anemia_falciforme_hemoglobina_ss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/the_alchemist_book_review_essay.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 7

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_off000068d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D0 5492 bytes
SHA-256: a7ede5dafdd1fabf55953c64ee2db3100b3fc64ea36ff36498434f80796411cf
font_01_sfnt_off00007b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3F 10568 bytes
SHA-256: 55cb3f3a6d7feafcc6f2b245d10d8b320f40d7c001ea4b2c099d7cb9adf696ce

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