Malicious PDF — malware analysis report

Static analysis result for SHA-256 8930e627cdd19382…

MALICIOUS

PDF

44.6 KB Created: 2020-10-31 00:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 737fb96aee7946b19811c012609c0d12 SHA-1: 847e575add83cdf9585e8ed386a85416d9cdde2c SHA-256: 8930e627cdd193829fc5434eb2f58dd8fc3edcbe4cb98d7c12ee423d13f667fb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to known malicious redirectors or link farms. The primary malicious URL identified is https://cctraff.ru/123?keyword=a+drop+in+your+bucket+definition, which is flagged as malicious. The document's structure suggests it is designed to host a large number of links, likely for SEO manipulation or to distribute malware, aligning with a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?keyword=a+drop+in+your+bucket+definition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f92d646bb0c7.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/voniduzakozeluxagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5f95051f5ca70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5f9bc444748ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5f8e41228acc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f8e11e5909b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f94238752c4c.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/1/0482/8440/1819/files/neuropatia_diabetica_gpc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/japji_sahib_path_written_in_punjabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/rarizunenuxixor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9376/1956/files/zevozaxamozosoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1518c3fd-ff19-4c63-9124-3706fb6787fc/metodo_filosofico_mayeutico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4926/1500/files/shadows_of_evil_easter_egg_2_players.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2070/4150/files/rotufetigogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9399/2622/files/83274381099.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7123 5024 bytes
SHA-256: a2eb02873b412ec06a06ef8a6540037083421d8a104411f2bdaba5fa97bcb77a
font_01_sfnt_off00008259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8259 10304 bytes
SHA-256: 82c68ccb23a470fcc721f97b51d3f36db8de104cd75ba919e23b8120cd56a626

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