Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d2174510fd89ed…

MALICIOUS

PDF

87.7 KB Created: 2020-10-30 11:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b229e6ed5d1d419a1efd331452a8934b SHA-1: d959c2564529a972456bfebaee2895f606272dcf SHA-256: 11d2174510fd89ed0bb5be5f2dc1b9f6d4303f481fb87f8cd8ac315cfb29101c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. 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 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/pify?keyword=cool+browser+old+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f97ec992f174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f8c18b9833f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f97904a88876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f8b050009218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f96556a13655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f8aac142816e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5f90fc91ba819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f89033f9913a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f954c2ab4495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8752036c545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f8e50fa2b6d2.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/1/0503/1421/5609/files/noxadenudimixodoguzofu.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39F 5156 bytes
SHA-256: e332cf1a40668b607a5b53641f4a520148663e2b007844eec0cbc1d15181e5c0
font_01_sfnt_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 20244 bytes
SHA-256: d61d8672fcc41c2fb02eabbdbd81734a1d3a8940382d2ed6f6419d1e27bda40e
font_02_sfnt_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 11480 bytes
SHA-256: bf152364c3eb82cf1a8784380d7c4dd871455a6da8a0dc44e4120a9c9bf9aa6d
font_03_sfnt_off00013a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A69 16628 bytes
SHA-256: da13d01ac0a5124c4979df9b2b4cecfc138dbd2de092c012d6d773424c936f8b

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