Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a652132ed6061a…

MALICIOUS

PDF

43.3 KB Created: 2020-09-18 01:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6f3356fbd8a418adc4cee524a3a240b SHA-1: 4135dbc0d423b5f68559035a6b89fca802c6c896 SHA-256: d8a652132ed6061a002a65be706070432b087ce22c018d8b4cf12ef5842ceb6a
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links that point to redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary lure appears to be related to 'dna structure and function crossword puzzle answer key', suggesting a social engineering pretext. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of this document. The embedded links are likely used to distribute further malware or lead users to phishing 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=dna+structure+and+function+crossword+puzzle+answer+key In PDF document text
    • http://jiridewi.abritoart.com/uploads/1/3/0/7/130776760/7629070.pdfIn PDF document text
    • http://vifuwe.unitylegalsolutions.com/uploads/1/3/2/6/132695375/dopejal.pdfIn PDF document text
    • http://fipukogel.escondidofoundationarch.org/uploads/1/3/0/7/130739006/5658055.pdfIn PDF document text
    • http://larase.livethebelife.com/uploads/1/3/1/4/131437425/5248766.pdfIn PDF document text
    • http://files.mitradingschool.com/uploads/1/3/1/6/131607054/zamelo.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/1/0429/1395/6007/files/oblivion_modding_guide_nexus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/25643102241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/66148023728.pdfIn PDF document text
    • https://eab02bc4-8ea5-4575-9d60-104c7d7f50c3.filesusr.com/ugd/510a18_bfe5f7ee87c94f93abb22575734094f0.pdf?index=trueIn PDF document text
    • https://a81b5e03-8442-4e7e-9adf-1dd2fe23e1df.filesusr.com/ugd/696117_96d6590406574ad4ab3417015b7dc86e.pdf?index=trueIn PDF document text
    • https://0bf75d96-82ba-4d04-941d-bd3ab0e253f6.filesusr.com/ugd/418e76_aa4f80d73050498f8209fd0b97860981.pdf?index=trueIn PDF document text
    • https://25c52d03-61fa-4d45-aa78-cc4ccc113d24.filesusr.com/ugd/4117a9_cf74ce50a67349e281ab0481d552bf4d.pdf?index=trueIn PDF document text
    • https://52bcb483-671b-49f6-9da5-811a8bade7ba.filesusr.com/ugd/c1c462_f16bd920e9564a919b74735fe8649ffc.pdf?index=trueIn PDF document text
    • https://019114a0-1342-49c1-a5a3-a16fadeeade6.filesusr.com/ugd/0aab01_360dc9c5ec55405e9972b3ae2201eb7d.pdf?index=trueIn 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 5

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_off00006a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8B 5456 bytes
SHA-256: 8566b762d9b7a59de16b51dfb99666728995c0726ead9db2f36f2f861b8f94bd
font_01_sfnt_off00007d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D55 10024 bytes
SHA-256: 728e30982c59c2e4dfbfe3ce87b79f3154e505de5909d655ea53948e5f6e5d8c

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