Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e5a6579f2ef12a…

MALICIOUS

PDF

54.3 KB Created: 2020-07-28 00:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75b369b9f29598c59097b656efef6bd8 SHA-1: 47d158d327d2c49bc1baa35e0efe48257225e51b SHA-256: 43e5a6579f2ef12abd5e47b207e8cb26a2ca5caf57a911af7f1841ed6b15722e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links points to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create SEO-optimized PDFs for link farms. The primary attack pattern involves directing users to potentially harmful external sites.

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/pify?keyword=formazione+cagliari+inter+2+giornata
    • http://files.gflight559.com/uploads/1/3/1/1/131164202/a6e9d86.pdf
    • http://files.atriumcorporatepark.com/uploads/1/3/0/7/130776743/xixufo-xojatowarepuvo-lozikimasu.pdf
    • http://files.crystalfletcher.com/uploads/1/3/1/4/131453484/3662320.pdf
    • http://files.thejohnroannut.org/uploads/1/3/1/4/131412603/sarigumaweneja_zilefuxaloba_kebalekeziba.pdf
    • http://files.theothershoe.net/uploads/1/3/1/4/131453484/2497853.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/21021841180.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/66342336941.pdf
    • https://cdn.shopify.com/s/files/1/0434/0236/3045/files/muzofibobaluvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/xegaxepevajubus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3447/files/31912689408.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/fajawebel.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/55400645226.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/zalowizirufidadusosomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/fevunukefew.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/xaxuberabedawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2145/files/mawinadorosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7347/files/32535839529.pdf
    • https://cdn.shopify.com/s/files/1/0440/6453/8776/files/mazapuvabobopetuja.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_off00008b81.bin
64fd86e7c47f9b1a3ffd184deec42f2431b5f5a52dbc22a8fcb5f6abee1bafea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B81 4868 bytes
font_01_sfnt_off00009bed.bin
d330ceb8e0ef5d7b10aa8ad394b4f56c09d4cec0df229a0d72b4110fe97d7bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BED 15028 bytes

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