Malicious PDF — malware analysis report

Static analysis result for SHA-256 326c477ae1e26fe0…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 17:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1c50103e8ef05cebfd72df82d87d113 SHA-1: 737bc357e8ac4761feb334ad3ef13e9c17959603 SHA-256: 326c477ae1e26fe05b7cd5e1ae7f860d16bfa4e4fe1b1faddc5033efd1f6775f
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body text, though partially corrupted, includes the URL that triggered the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This suggests the document is designed to trick users into visiting malicious sites by appearing to offer a specification sheet. No scripts were extracted from this sample.

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=sheet+metal+bending+machine+specification+pdf
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdf
    • http://files.alexbuehler.com/uploads/1/3/2/6/132681970/9416970.pdf
    • http://files.castleworksmotorsports.com/uploads/1/3/0/7/130775490/bopezoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/72128982698.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/46552669227.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/16024417087.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/91024316824.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/mamijowudifepokomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/srimad_bhagavad_gita_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/9509141707.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/fopugajimivaluvuwebesox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/transportation_engineering_and_planning_papacostas.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_off00005ffa.bin
cf360e4e7e43b7ccb786c6f07140ef0a0a2247e5fa65cde67aff9cf46c95f2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFA 5716 bytes
font_01_sfnt_off00007345.bin
90755a43d6a9d2c9627c28ed6afeddb53bcc543eced9f3ea263585661fe63af2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7345 10168 bytes

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