Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a9f1677e804b1a…

MALICIOUS

PDF

43.5 KB Created: 2020-09-10 22:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a51385bc1971696579cf6eb25896e34 SHA-1: 5aef9b12c0204402ee1f9f086201de2a3dbbf76a SHA-256: 59a9f1677e804b1a3ef6f1a203eccfe7c4fbff8f8f56fce95858611069da0da4
120 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.link/wix?keyword=alfredo+bosi+reflex%25C3%25B5es+sobre+a+arte+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links, with the primary one leading to a potentially malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a lure to trick users into clicking the malicious link.

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.link/wix?keyword=alfredo+bosi+reflex%25C3%25B5es+sobre+a+arte+pdf
    • https://static.usrfiles.com/ugd/575363_dc9c3fff30544a5aa68d7ed2a2be1a9a.pdf
    • https://static.usrfiles.com/ugd/bfbc46_19e2662df6cb48d48bc86022d1d9c09f.pdf
    • https://static.usrfiles.com/ugd/2274a7_bac7b383d8094344b53e46a380b1fd44.pdf
    • https://static.usrfiles.com/ugd/2a2e94_f565c7b315c645338ba2da6643165992.pdf
    • https://static.usrfiles.com/ugd/6116da_4c22f86618c645a9a8919b416ae2400e.pdf
    • https://static.usrfiles.com/ugd/d2751c_69007bf13fa64e948b1414399053f325.pdf
    • https://static.usrfiles.com/ugd/8b9728_d8b406ffad024097a274957fc15fa041.pdf
    • https://static.usrfiles.com/ugd/b8c837_f56671191947460eb84ea13a712d7700.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/vojegezifelakupeviguda.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/best_calligraphy_guide_book.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/
    • https://static.usrfiles.com/ugd/b8c837_f56671191

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a0.bin
b9cd24b295a88275971927a75b4a362a5da43e3d4a8d48ead93ea970481cc015		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 5452 bytes
font_01_sfnt_off000078f3.bin
d48dbeaed0db7693a469aad8fe9058fd5883f2c93b944b5f52abc4e0ac3f7cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F3 12528 bytes

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