Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe85f08b13385bc…

MALICIOUS

PDF

32.1 KB Created: 2020-09-17 13:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68047b396092e37d3226c38878bc3c67 SHA-1: 4048b8c265350916d2d98040ec7d85159c33e7ed SHA-256: 4fe85f08b13385bc2328911203d5f6a01fd18d7e2ca3bbde3d18e85621382a68
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a mass of external links, a common tactic for SEO poisoning or redirecting users to malicious sites. The primary heuristic firing indicates a link to a known malicious redirector at 'https://ttraff.me/wix?keyword=rank+size+rule+ap+human+geography+formula'. The document body also contains this URL and numerous other PDF links, reinforcing the malicious intent. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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.me/wix?keyword=rank+size+rule+ap+human+geography+formula
    • http://files.neurosurgerytraining.org/uploads/1/3/1/4/131438459/513b6.pdf
    • http://ligod.inmanstudioarts.com/uploads/1/3/1/1/131164077/de6f1a50d597d3.pdf
    • http://nikeji.reginalopez.net/uploads/1/3/1/8/131871721/2245721.pdf
    • http://gojimema.dennisblundell.com/uploads/1/3/0/7/130775365/jivudapera.pdf
    • http://xodudoju.okaaugym.com/uploads/1/3/1/8/131871622/wuzubipesisej.pdf
    • http://detifata.dugeogsoc.com/uploads/1/3/1/3/131398368/xebeduxoripa.pdf
    • http://wopube.dslvnjny.com/uploads/1/3/2/6/132696056/18b0ff5.pdf
    • http://vifapi.bsascouts800.com/uploads/1/3/0/8/130814851/25a901af24.pdf
    • https://1d52706e-08cb-4794-a06b-0e17a9b389e0.filesusr.com/ugd/5ad03d_3854259a468d41789d22a906410d8823.pdf?index=true
    • https://57a35d38-ee79-4337-bf67-8e48a00e1a41.filesusr.com/ugd/24deb6_20fb2ba7b8f146d0be0bdd59c9a7fddd.pdf?index=true
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000409e.bin
e37f1cbaa65e7b26c1dd280407cfb211bf4de5856d86018368fd20918eeb9948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x409E 5540 bytes
font_01_sfnt_off00005367.bin
dcd032038ef1971eace606d3a2340ec8fe993ecd000d6cf7ced655c1f94cd523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5367 9444 bytes

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