Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1710cabd5dadee…

MALICIOUS

PDF

50.2 KB Created: 2020-08-02 03:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c407182a306a950237472850266f24b5 SHA-1: 710aed1e6e31a6d740bbb444f6500604629a7efe SHA-256: 3c1710cabd5dadee5a560a1e3bd18f656e3d94c60593c02907e05d1bddca127c
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to obscure malicious destinations. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=install+unifi+controller+ubuntu'. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to download further content. The ML classifier strongly flags this PDF as malicious.

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.cc/pify?keyword=install+unifi+controller+ubuntu
    • http://files.volusiaschoolcounselors.org/uploads/1/3/2/7/132740172/xikakimulafidibebe.pdf
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdf
    • http://files.birdsongholistic.com/uploads/1/3/1/4/131453536/9188689.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/1205535471.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/wosaxon.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/69617132678.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/10472914955.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/2911150151.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/79971145336.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/56338423915.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/12152432721.pdf
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/jizulem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/30305589288.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/dinimigoxirugopozawun.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_off00007f6f.bin
8bdf249eb2f00595e51027fa38c9a37701ae70cc0be89fa4dc1baeccbd96deaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6F 4952 bytes
font_01_sfnt_off00009054.bin
6d028d32e6519039cdd569bfed8baa50a7ada66a3767b67f700ea89b78013eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9054 14116 bytes

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