Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b0affc9ed1b807…

MALICIOUS

PDF

48.0 KB Created: 2020-08-06 02:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db4f381d5a0bd6c605b421fde4c1268b SHA-1: a9436a883636b49029dd918a2a3313eecde4dd5e SHA-256: 04b0affc9ed1b80705c7cc522d19dc7b5fe4db2770d6164910d4dd23bc078300
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links designed to create a link farm, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though partially corrupted, suggests a lure related to cell biology, likely to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=cellule+animale+et+v%25C3%25A9g%25C3%25A9tale+diff%25C3%25A9rence+pdf In PDF document text
    • http://files.leespawsandclawsshelter.org/uploads/1/3/1/4/131454620/peselumevorebe.pdfIn PDF document text
    • http://files.firstmedicalprototype.com/uploads/1/3/2/6/132695575/vamatovej-zabojefimolen.pdfIn PDF document text
    • http://files.nikkileon.de/uploads/1/3/2/7/132712006/bujudulu.pdfIn PDF document text
    • http://files.stkittswatersafaris.com/uploads/1/3/0/8/130814535/81b1f28aa426b.pdfIn PDF document text
    • http://fijorese.arboristabroad.com/uploads/1/3/0/7/130776487/gizirisikisax-gutobekekob-furojenasa.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/1/0432/5713/5257/files/41116407728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/kb_mb_gb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2457/0792/files/70667493376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/94594053147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/wajisewexemumava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/74323402674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/54333944436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/burp_suite_full_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/3958224764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/vitaxotumafadiviriwiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4346/9974/files/23529252144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/35300860761.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 8

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_off00007939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7939 5404 bytes
SHA-256: b96dfda75660da8936d70fa314d1f84b23bc33dea3fcdd988dc0db5dad38264b
font_01_sfnt_off00008b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 11756 bytes
SHA-256: dda57a15447e226db07450022a6a70aff612cf1824b3ab0f7be23ad2d3095c0a

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