Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6082ad2b90cdf0d…

MALICIOUS

PDF

47.9 KB Created: 2020-09-01 06:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9824a3d3f06e46a11ebd34852d7a93d2 SHA-1: 3b10b9f5acc93d3631525a3de4a3a9ac1997c762 SHA-256: f6082ad2b90cdf0d37369f78264b563fc4266c18c740d1c5928aadf4edd13323
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.com'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect the user to a potentially harmful site. The ML classifier also strongly flagged 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.com/wix?keyword=canada+lottery+application+form+2017
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/80014264755.pdf
    • https://cdn.shopify.com/s/files/1/0437/0297/6666/files/97031278636.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/39969952153.pdf
    • https://static.usrfiles.com/ugd/b8c837_693ee6fde0234f50981d66cb7a8eb40f.pdf
    • https://static.usrfiles.com/ugd/87a178_a5ba9a7718fa41ef93497c0a899486d8.pdf
    • https://static.usrfiles.com/ugd/c63dba_05103d7cc1af4027b65203863434266d.pdf
    • https://static.usrfiles.com/ugd/0a0016_6307a87bbb464accaf9c11bbd96ae7ba.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_0a012bcd7ac64cd0aa45b6d307183f02.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b24c6deb4a648ad9a091e503c9e2690.pdf
    • https://static.usrfiles.com/ugd/ef253e_3e86488544734db6abe6c078c7b1f17a.pdf
    • https://static.usrfiles.com/ugd/99a8f2_bac170e06ed54c3ebd8485f7f11ed103.pdf
    • https://static.usrfiles.com/ugd/a64c8c_29a37a5bd351440d8341f658ce6ef9c5.pdf
    • https://static.usrfiles.com/ugd/80c1db_e9695677975b47948ee2f18f00fc19ef.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_off00007c1b.bin
d3e1cff3d2c22e0f87e8fdf8991b54e983e068ce2fb71ab192851a24f3ebf6b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1B 5536 bytes
font_01_sfnt_off00008ef2.bin
c55e96d20cf4a33119638e5862a9e2cf83869858f06c6a714cfc2500c02f1dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF2 10444 bytes

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