Malicious PDF — malware analysis report

Static analysis result for SHA-256 260f9e424879db83…

MALICIOUS

PDF

46.3 KB Created: 2020-07-24 11:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1231b4ffa8b3fbde519c40ba1c09e6b SHA-1: edb1e0e7dff02141745177b1d6c1cbbde0bb0efa SHA-256: 260f9e424879db83e19dbe4a2fc56bf2ea44342ef78465696519a8e25e8b2195
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Right foot bunion deformity icd 10', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=right+foot+bunion+deformity+icd+10
    • http://files.lalarukhgroupofhouseboats.com/uploads/1/3/1/4/131437983/sodojixezaniwusir.pdf
    • http://files.kalonica.com/uploads/1/3/0/9/130969313/686b745538.pdf
    • http://files.cdl-canberra-ec.com/uploads/1/3/1/4/131406843/pukurajagefapu_xamuwos_togomisojor.pdf
    • http://files.cdl-canberra-ec.com/uploads/1/3/1/4/131406843/pukuraj
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/33493485408.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/5117114549.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bewasovenajuwawofitef.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/sezulevinaxini.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/xumonoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/zuvepivapelugixamosatup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/roped.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/bupijuguw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/benep.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/vaxelafogajer.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006de2.bin
b57980ad931354eb0d2586b741f9a8cf4c56bc4a523c489ecb5065c5234854b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE2 5340 bytes
font_01_sfnt_off00007ff6.bin
2d7ce8bf04a7bc9f5dd69e5469a76d4ad3415190fdf34a9fb59147f05e40a41f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF6 14272 bytes

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