Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acc56f8d01c1c22…

MALICIOUS

PDF

51.5 KB Authoring application: Serif PagePlus
MD5: 872f4bdcb084edce986d3e053b3fab12 SHA-1: 4aef2745c14279f946c02ecfbdb8917e7c871cb8 SHA-256: 7acc56f8d01c1c22f56d91a2d0391b65c27197625de6a69bacbf951b780e80f4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, as detected by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection further support the malicious nature of the file, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. The document body, though heavily obfuscated, contains references to these URLs, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://theplugalex.com/uploads/1/3/0/5/130588607/jomizumefijaj-fakoxusukepatu-zubagi.pdf
    • http://christinagdennehy.com/uploads/1/3/0/4/130489363/dotadawapowumokegav.pdf
    • http://steveburketraining.com/uploads/1/3/0/5/130589241/46911.pdf
    • http://ndchair.com/uploads/1/3/0/3/130323251/130323251.html#aquarius+vs+leo+yahoo+answers

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000108e.bin
bcafafe6895443508630e99cef6e09469199c5f032827608867354c14193eaea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E 9900 bytes
font_01_sfnt_off00008be2.bin
911d39c859fa2cde7ee6ebc0651b12d85200731a9fdbb53a5e6f3efe0b0dea57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE2 6960 bytes

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