Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a0713447d604ac…

MALICIOUS

PDF

42.0 KB Created: 2020-09-01 14:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baedd5fa169e80fae75592e792f460d3 SHA-1: 4573c67803a93f835aca92df2e282a0bb688811d SHA-256: a5a0713447d604ac66b936a8ebfb3a5e027adcdf7638cd36271c3967792217ef
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=garnet+hill+cotton+knit+sheets, which is likely used to redirect the user to a malicious site. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a larger link farm designed to manipulate search engine results for malicious purposes.

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=garnet+hill+cotton+knit+sheets
    • https://static.usrfiles.com/ugd/22739b_9e1818a8688a4d1db5d3f36f2ee6b83f.pdf
    • https://static.usrfiles.com/ugd/41a0b6_d1d1570dbb8c4a8bbf0cfd2994ec4044.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_812dcf5fddcd448ba88ebd4da99c1b4d.pdf
    • https://static.usrfiles.com/ugd/de65f7_f6a021f43ec64fb0b3493b9bf1da043c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5457bbe5509467abd543692feda57f7.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/bradley_hand_itc.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/nudupoxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/game_basara_2_heroes_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/posazapimobasemawej.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/minecraft_scientist_skin.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/83128016226.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/99433599903.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_off00005904.bin
693e5278c094b948bc045e8b653c3ff8e57dd0fe87f20e74cc5f541486d37e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5904 4768 bytes
font_01_sfnt_off00006923.bin
d635f472e1fc1b1ed7115597abfd211057e4b37bf49d2e36ef4a6722a8491f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6923 10704 bytes
font_02_sfnt_off00008d97.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D97 4324 bytes

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