Malicious PDF — malware analysis report

Static analysis result for SHA-256 a610ab17b9a1a52b…

MALICIOUS

PDF

48.5 KB Created: 2020-09-01 01:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0040d89b427b8fe8700ebf8b0d3c1c99 SHA-1: 57190ea4b57147fc4120d31c7000d9f6e934259d SHA-256: a610ab17b9a1a52b5fec011281b53a5768ca9b9108b47d9d7a2c2e2b79584ef0
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=sing+alleluia+to+the+lord+satb+pdf'. This URL is presented within the document body, suggesting a phishing or redirection attempt. The presence of a large number of external PDF links, many of which are generated with numeric slugs, further indicates a link farm or SEO manipulation tactic to distribute malicious content. 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.cc/wix?keyword=sing+alleluia+to+the+lord+satb+pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/pofamisaxulijarixowovazuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9141/1615/files/2001_mustang_auto_to_manual_swap.pdf
    • https://cdn.shopify.com/s/files/1/0463/2343/3634/files/common_core_geometry_worksheets_5th_grade.pdf
    • https://static.usrfiles.com/ugd/d5d855_15ee3c0bc2ac4915a854c50d99f7d7a5.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/takiwonibugijekep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://static.usrfiles.com/ugd/8cbfce_494e36d4945a4bf0a95dcdba3d1de546.pdf
    • https://static.usrfiles.com/ugd/9b5f63_158d7423fb4b48e3b907b15a34973ebe.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd86df1d45b439bb0196b904063b124.pdf
    • https://static.usrfiles.com/ugd/353d00_58a49738ccf54be099d367a7e9391391.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_7871233f0a3c4504bf05828bfffec15f.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_off00007ec1.bin
43eded9f32fbb3d3c359dc8a8bbf1f01759a8bc9f8548b080a8f25b3bd8ce909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 5548 bytes
font_01_sfnt_off0000918b.bin
9ca6621c9332fe42fb86ba60d156c312631890b9b1638f00aade26ecede8204b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x918B 10392 bytes

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