Malicious PDF — malware analysis report

Static analysis result for SHA-256 db11c1d859605409…

MALICIOUS

PDF

58.8 KB Created: 2020-10-30 22:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 23971a2b060beab1b2b64575fc5b1a44 SHA-1: db1f875ceae4e19bbc7cca5cc4c63a2a0d447d00 SHA-256: db11c1d859605409a665822f694a3de70eda1da729f16084b6c0447e35666647
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=nordic+track+c2200+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f8a51801e035.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/6770705.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/66296b8aac4805d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5f9861015ebc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f9bd9f4d2157.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/8424024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5f9c10b3cc624.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/3431214.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1193e8-40bd-44d6-9d0c-d9b88a70f67f/ritapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5631/5591/files/giturofetokuzuzovitaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2773/3940/files/70309976317.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B26 5212 bytes
SHA-256: 54fc401d4d74fe0c6a0990399beb464560758913a7a5c099df85f094269c3bf3
font_01_sfnt_off00009ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCD 10992 bytes
SHA-256: 7e3590f5ad7e49425fbf33e8c013095b90074541b53eb06eb6e32e43792436ad
font_02_sfnt_off0000c23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23C 18148 bytes
SHA-256: e01d26fa7de54747c00ef46f77b21f05fc940b081d7569df7ccb813df0ea3387

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