Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8dc1d034010c5e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-29 15:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 829d5abaec8d7edc9a920d4562860c39 SHA-1: 0cefd2823a4dbec1e8a9e353012af06b9cefdd01 SHA-256: 4f8dc1d034010c5eb42c2f3b112482deba79759854b58a88789aed8d3dae2eba
120 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 'https://ttraff.cc/wix?keyword=psychological+approaches+to+language+learning+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0447/0597/2377/files/suwiwineme.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting a social engineering attempt to redirect the user to malicious content.

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=psychological+approaches+to+language+learning+pdf
    • https://cdn.shopify.com/s/files/1/0447/0597/2377/files/suwiwineme.pdf
    • https://cdn.shopify.com/s/files/1/0438/7287/8747/files/descargar_talones_fone.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/elemental_shaman_leveling_talents.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/dosevakamulikosotova.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8607/files/suvuzavuf.pdf
    • https://static.usrfiles.com/ugd/b8c837_820a5227004c441c8dc8a2499c615489.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec1581671e9f4cbabdd2bf6ea3278440.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/susanurekugumezemanajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/kaxapegumuvorabegul.pdf
    • https://static.usrfiles.com/ugd/b8c837_d50be2bc83cb4fbfa2652433e6701777.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a36d9949354433ca8684a5763695c9d.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_off000060a7.bin
68bdc9b9f29ea31c7dbb29623575920f590eb3430eda11e9e44942afbd185c84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 5404 bytes
font_01_sfnt_off000072fe.bin
e6b55561edcb6f1f9eba91cf4ca02469ae7bfb657c62d89f77d4a095dca5f686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FE 10076 bytes
font_02_sfnt_off00009588.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 4324 bytes

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