Malicious PDF — malware analysis report

Static analysis result for SHA-256 667ecdc4f5eca427…

MALICIOUS

PDF

48.9 KB Created: 2020-10-23 21:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e66b16f9bbb3ddfa5ca1683302339698 SHA-1: 7bc07ec2cf89f8160ca56d6b88265e3d3c62f92d SHA-256: 667ecdc4f5eca427ac04a9fec2276c0dbcf9bb8b968a2601bfc741075fe2cca7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. It also features a large number of embedded links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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/strik?keyword=roma+hukuku+terimleri
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f8935dceb062.pdf
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f87c559af45f.pdf
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f89f1eeb3619.pdf
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8db4ba944e0.pdf
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f90a2cf10271.pdf
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8b3ca9f3cbd.pdf
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f887cb581a1d.pdf
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5f90f180b8940.pdf
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8785c5d684a.pdf
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f913421beec4.pdf
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f8bd9c9171f6.pdf
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f8ba1f67c101.pdf
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f87ae3b817fd.pdf
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f87d3c673e52.pdf
    • https://cdn-cms.f-static.net/uploads/4389101/normal_5f92ac84cd753.pdf
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f8ff05e5386e.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8910c30c850.pdf
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/komexirokomejojake.pdf
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/nifunapijitim.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/826b873ef97b.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/987b21c6b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9f3c8065-abbe-4735-a7ee-32470d3be681/45180329903.pdf
    • https://uploads.strikinglycdn.com/files/3b28e2cf-8273-4019-9b63-a463530d7cf8/90274717103.pdf
    • https://uploads.strikinglycdn.com/files/7e2552b9-763a-4737-ab0e-cd2ae2d8a97d/fawiguvawaxire.pdf
    • https://uploads.strikinglycdn.com/files/fa1d1278-d214-4ff0-b3a8-65adbe4dfc38/26930769623.pdf
    • https://uploads.strikinglycdn.com/files/98bb22ae-57f7-46bb-88e8-25a8fc539340/setuzovadevi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e7.bin
8332a16e94f9a1c861b65bd86269e5ace4fc4866f8fa851e8119c947a479fa3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 4820 bytes
font_01_sfnt_off00007a19.bin
a3be8088d83a780450ed413a25d31649ffab161ad639e5fadd77bb36403e8fb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 12296 bytes
font_02_sfnt_off00009fe0.bin
dea42a645509e47913d94a3c1ff2e7ffecf6ca7e8d06e08a5f86f932263db97d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE0 16060 bytes