Malicious PDF — malware analysis report

Static analysis result for SHA-256 20acbce0bcb4411b…

MALICIOUS

PDF

52.1 KB Created: 2020-07-30 05:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03672e3be64f9fb8cbd4071ef0748c45 SHA-1: b3d2c99356851ccaaa280ef18ad11b4bf5c2980b SHA-256: 20acbce0bcb4411b5744821d35828e1d5eded9867676cd2b3e140d5c1ae4c21c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one prominent link directing to a known malicious redirector. The document body, though heavily obfuscated, contains keywords related to the linked content, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing the user to malicious infrastructure via embedded links.

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=abnormal+psychology+pdf+pearson In PDF document text
    • http://files.denicechenault.com/uploads/1/3/2/6/132695586/loferovola-zanuwuvo-rukaf-kafapij.pdfIn PDF document text
    • http://files.iscebs-chicago.org/uploads/1/3/0/7/130740392/fetepofefomaj_jibipisatigo.pdfIn PDF document text
    • http://files.melfoamacoustics.com/uploads/1/3/1/3/131384777/kekaneneb.pdfIn PDF document text
    • http://files.simonmorse.com/uploads/1/3/1/4/131453636/5707778.pdfIn PDF document text
    • http://files.kristysfineart.com/uploads/1/3/0/7/130775282/woxebajegitiwig-tubeluvo-sidemon-zibax.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/1/0436/9747/1656/files/94946700933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/79577759701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/sigizimozibamagazilezut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/vomalogofawaxesisuzuzef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/52286175041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/68251524736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/22907218716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/masosit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2715/2539/files/nusuvijiganeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/kobesolinezed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2616/files/rikofubotatebipefixevogu.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_off000080bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BD 5460 bytes
SHA-256: d46d9828bd107d91f6246b6c65f75b299a4fc85f040ad89bd347d9291a957ac9
font_01_sfnt_off00009309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9309 14964 bytes
SHA-256: 9fc8b364b8792094f9950d40c5b0d8ac64eed34a327a435f5df8cbce8aacd0aa

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