Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8da44b462c1f087…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 23:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 528eaa11c50e5236faa1cdb7389a0a3c SHA-1: 7bf8a5adc32d1e79f5dc8867879e173c9ded1cd0 SHA-256: e8da44b462c1f08751fdcd2c6e739c83a865b71acccf85117fa5d1bb9b9dc71f
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=essentials+of+business+communication+11th+edition+citation'. This URL is likely part of a phishing or malware distribution chain. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, also contains the malicious redirector URL and a benign-looking PDF URL, suggesting a deceptive lure.

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=essentials+of+business+communication+11th+edition+citation
    • https://static.usrfiles.com/ugd/fe83c3_ef957140594f4bcb99acbc1d0d0b72bd.pdf
    • https://static.usrfiles.com/ugd/a467d2_cc9c2fcd7d7f431185c130d5d063fe0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5174640b49f242659a64cefd91a3e8d8.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/pravastatina_dosis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/fipawuleniborarokewekam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5898/6150/files/13800247276.pdf
    • https://cdn.shopify.com/s/files/1/0463/3853/9682/files/sokilejevarewa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4214/4407/files/motorsport_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8410/3332/files/45156365662.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/57179239657.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1b63a1a5464ea5ad75349c5086a720.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_6ea227b0685a4a89ba1187938dd52fe0.pdf
    • https://static.usrfiles.com/ugd/6cf392_c35d603dedb94c85b8284e7115f8b09b.pdf
    • https://static.usrfiles.com/ugd/9219f8_bff960eb53ec466391e684acc2eac53c.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_off00005ed7.bin
0d019cf552476e78fd02821daf81c10e5807e015870e050b34e8fdd0e40524d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED7 5316 bytes
font_01_sfnt_off000070c5.bin
e85cb2ee7e55dade950a7c25f4a095c75f04fa852e8345e6f92bdee63f8567ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 10860 bytes

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