Malicious PDF — malware analysis report

Static analysis result for SHA-256 042b1aafb4ca7d60…

MALICIOUS

PDF

41.1 KB Created: 2020-08-23 07:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51802a3217075e48fe5e3de812f16fa5 SHA-1: 231114043635660654d04016ab62f2eae5501dc1 SHA-256: 042b1aafb4ca7d60700b1c77309524284edf4756bfd451e6a16a86452420f644
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a primary redirector URL pointing to known malicious infrastructure. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a phishing or scam lure. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to harmful sites.

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=how+to+use+filter+in+google+sheets In PDF document text
    • http://files.falloncurry-photography.com/uploads/1/3/0/7/130775784/joxigurej_tazejew.pdfIn PDF document text
    • http://kegiwof.rogertiley.com/uploads/1/3/1/8/131856543/bba7c.pdfIn PDF document text
    • http://javatib.handsonsafetyandhealth.com/uploads/1/3/0/7/130775062/solamasepimegox.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/1/0437/3191/0821/files/budgeting_worksheets_for_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/grammar_test_with_answers_explanations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3274/6906/files/63675350163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/86025704927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7498/5885/files/mcgraw_hill_education_science_grade_8_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8386/6018/files/duponunedosumazarifew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/85514502120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1897/7443/files/livro_assertividade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/70283376005.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 1

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_off00006302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 4872 bytes
SHA-256: 6452582e0a7619f9722fcc5afcaedee341706773743a5bc6b5516bccd78cb93d
font_01_sfnt_off0000739a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739A 10492 bytes
SHA-256: b4435d0b94b44dea8378eb2856d689ea0241ac7dd63c501552289724fa7eb853

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