Malicious PDF — malware analysis report

Static analysis result for SHA-256 934f5bfbc2703361…

MALICIOUS

PDF

43.2 KB Created: 2020-07-31 06:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c2230258752789c58603b734428e8fc SHA-1: cc4de198ef7f4b01799cdd54970427a5ba2b51ae SHA-256: 934f5bfbc270336122828cfa5f0cd838d42eadeb6aaafcfbf449ffdd7bc89775
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure (ttraff.cc). The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute spam. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering through malicious links within the document.

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=a+practical+ampelography+grapevine+identification+pdf
    • http://files.highpeaks1stgrade.com/uploads/1/3/0/7/130775354/tuxevukef-lorotuxosage-zajuxikemitis-melakusitusa.pdf
    • http://files.juliamorizawa.com/uploads/1/3/0/8/130814680/butawiguluvis_gotejabakowod_dovixil_vapabika.pdf
    • http://files.otogroup.nz/uploads/1/3/1/4/131453267/furofaninivuluge.pdf
    • http://files.bariatricketo.com/uploads/1/3/2/7/132741211/pamojuzoberinel.pdf
    • http://files.bariatricketo.com/uploa
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/xopurovujibuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/femifof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/571475918.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/78115652739.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/poluzelifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/20471596695.pdf
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/62467635545.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5148/files/wurukovebiwowipisaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/89785646486.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/jolumekefakuropibu.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_off00006560.bin
e017d76ce1a367e6b0fcab782ea24c3dafbc9d6fc8aeacc603509c998577bd54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6560 5332 bytes
font_01_sfnt_off0000775a.bin
78274d0561df3927c433875968ad92ef23bb49da61426099b07d58a42a9d928e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 11916 bytes

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