Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3b60584670d968…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 09:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2a285a334c9d17f5bc7467e6d41a85a SHA-1: 02605a026304f86e9ea7607de0e9020a1bf70917 SHA-256: ab3b60584670d968d97af7b3c73ec99f2d820f809a47c5d42b5231db4477dea0
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, specifically pointing to 'ttraff.me'. This link is presented within the document body, disguised as information about a car part. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which point to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious. 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.me/wix?keyword=2007+ford+fusion+2.3l+serpentine+bel
    • https://static.usrfiles.com/ugd/b8c837_599af717375b49ce8ebeaa38fab98f12.pdf
    • https://static.usrfiles.com/ugd/299074_aa7222988dc249ef8edba21a64a30310.pdf
    • https://static.usrfiles.com/ugd/f09a9d_b5726c929ed64557a62ac693b5fee2e4.pdf
    • https://static.usrfiles.com/ugd/f55bec_41e7f6ed24c14269b819c971d5856949.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_cdc619af023c44ab8c0f0999630c4470.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/the_hausa_factor_in_west_african_history.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/wereziluberunubewojevam.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_44034e07f02f49b58fb4fe165ea9659c.pdf
    • https://static.usrfiles.com/ugd/565485_c496a3b6e2fc462baed54b92b3487d12.pdf
    • https://static.usrfiles.com/ugd/822ecd_a79a3bd2ca7b404392fe816453f18237.pdf
    • https://static.usrfiles.com/ugd/9734e7_9bd31180c09447ba8eb45f3097ae4aa4.pdf
    • https://static.usrfiles.com/ugd/fd7405_fe21183b948d49abaad92242c627355b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f93.bin
cb3c8636105b20bbcbf38e983a263530ba279404ca60264d22b482a896e12d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F93 12848 bytes
font_01_sfnt_off000079c8.bin
884d0938c1f8886ad6d4ae401d6672181b425d7c8ed506aab34995aa9f0cfcbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C8 5420 bytes
font_02_sfnt_off00008c3f.bin
0cce80eef02b12fc348d1985d5f59dfb679528ce10045df748dc9fedcd5b1abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 12232 bytes

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