Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df47606c2154550…

MALICIOUS

PDF

41.1 KB Created: 2020-08-15 00:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf5a34e51a9b0fce264ffed887411098 SHA-1: 0d5ff99ffb17cdcf9c6ae003937118de27b01189 SHA-256: 3df47606c2154550b2bedceb8c460369e11dda188be0525af360b88812895bfc
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as content related to 'common core standards'. The document body, though heavily obfuscated, contains the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=common+core+standards+pdf+ela, which likely leads to further malicious content.

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=common+core+standards+pdf+ela
    • http://files.laurenfalksoprano.com/uploads/1/3/2/7/132740564/c1252f5a559a0.pdf
    • http://files.whatnextshelly.com/uploads/1/3/1/4/131407952/fbfad7aa.pdf
    • http://libepise.submitis.com/uploads/1/3/0/7/130740597/sazipafasefudaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/bescherelle_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/batch_convert_word_to_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/padematoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/jofodifukafuxewamazitarel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/jexukixazowarope.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/data_tab_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/aceites_esenciales_metodos_de_extraccion.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/82412645250.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_off000065bd.bin
96a3a6b0825ad341c571f4cda3e43129541e9972e714e11ec474847d19e8ce0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 5208 bytes
font_01_sfnt_off00007751.bin
48ae8870d5ca83c5cfaf07e6356a6f8bd54f37eb1f9f6768b38ea69fe32aa7ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 9420 bytes

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