Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7dac8f8fb520f4a…

MALICIOUS

PDF

36.3 KB Authoring application: OpenOffice.org
MD5: 541d9c69570931446c04f9304adda828 SHA-1: 8ccd438d95c01b5fb86bc898367aed927d99aaa8 SHA-256: b7dac8f8fb520f4a1fbccb904679c2eb6c36f77135ec037e7c5d376d9fbfa970
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a malicious intent, likely related to phishing or traffic generation. The document body, though heavily obfuscated, contains references to 'Accountant resume keywords' and includes the same URLs found in the heuristics, reinforcing the lure.

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://mylegalwebservices.com/uploads/1/3/0/5/130539109/biwusizisebonoz.pdf
    • http://backtopulse.com/uploads/1/3/0/2/130273845/1180197.pdf
    • http://storyspinner.net/uploads/1/3/0/6/130605219/murolinipegaduwa.pdf
    • http://yachtrock.biz/uploads/1/3/0/4/130483155/vanobakivodi.pdf
    • http://digitalmonetizers.com/uploads/1/3/0/6/130604972/3834378.pdf
    • http://nicolas-rigaux-photographe.com/uploads/1/3/0/7/130739695/e32ac5c51.pdf
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/6/130604048/130604048.html#accountant+resume+keywords

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001114.bin
3d007f64c1ed48edacee3a84891927b0cd5421dd3ea39c18c88ad5143178cb6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1114 8600 bytes

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