Malicious PDF — malware analysis report

Static analysis result for SHA-256 b223f72b6c7dacb8…

MALICIOUS

PDF

52.4 KB Created: 2020-07-30 23:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02f3492a0160d59c39d320b1e526f9e6 SHA-1: f932a7992c0d732a0f470d93bb3fba90b5fca5d5 SHA-256: b223f72b6c7dacb8f1b1a47708a4fffd098c876203d4d41574416efc8c6b7361
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating it is a malicious redirector and part of a link farm. It contains numerous embedded URLs, with at least one pointing to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its direct lure, but the extensive use of external links strongly suggests a traffic redirection or SEO poisoning attack.

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=caffeine+citrate+package+insert+pdf In PDF document text
    • http://files.mingateachers.com/uploads/1/3/1/3/131384414/3794204bfe2.pdfIn PDF document text
    • http://files.acdavisbass.com/uploads/1/3/0/9/130969754/458cf81ed37.pdfIn PDF document text
    • http://files.woodcraftguildtasmaniainc.com/uploads/1/3/0/8/130814340/830762.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/1/0432/9802/9733/files/31870004188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/luvipaged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/dakimepaselunanilunabexer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/5428556901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2530/9601/files/jomovulovobuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/doduxenuwawubopoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/86154867770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/86170090017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/savekano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/tabatomamudupogubusavupif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/kapuxogokawafibed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/49117384003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/tususiwade.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_off00009001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9001 5056 bytes
SHA-256: 0e376b8455fc4e5d4fd1956140a6b35cd329ae8956cec5fabeca0e9f144443cf
font_01_sfnt_off0000a14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA14A 10272 bytes
SHA-256: c0ce5ee48aee4875daf3f3a789b11c038cef435c2bc942b6d72341dadcb30a3a

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