Malicious PDF — malware analysis report

Static analysis result for SHA-256 08818b640ae3655a…

MALICIOUS

PDF

53.1 KB Authoring application: OpenOffice.org
MD5: 79bfb207a5f24447d529ece3abb2896e SHA-1: b91fbffc81a19a10d23a98f17069fcb66a116e64 SHA-256: 08818b640ae3655a4e1546bf987adcb7738b2bc51fe47eff63e4ebbc6ae8b9ed
192 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, masquerading as a download for a game mod. This technique, identified by the 'PDF_SEO_LINK_FARM' heuristic, is often used to distribute malware or facilitate phishing. The 'ML_NYX_PDF_MALICIOUS' and 'ClamAV_DETECTION' heuristics further confirm its malicious nature, with ClamAV identifying it as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body, though heavily obfuscated, contains references to these malicious URLs, suggesting an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://abbaproperty.com/uploads/1/3/0/4/130436014/wavovus.pdf
    • http://vexirmx.com/uploads/1/3/0/5/130588433/f2199a.pdf
    • http://mpgamestudios.net/uploads/1/3/0/6/130620991/92c22603fb8a.pdf
    • http://coopermanselfdefense.com/uploads/1/3/0/6/130639038/4693696.pdf
    • http://mirandapueyo.com/uploads/1/3/0/2/130271237/falunamobosodobez.pdf
    • http://a1412531xstreamtravel.xsideas.com/uploads/1/3/0/7/130775174/130775174.html#counter+strike+zombie+escape+mod+apk
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001157.bin
0ad62f89258996b70a131a80ea553f877c1be304153f5723554a9c73cd54dbf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157 10560 bytes
font_01_sfnt_off00007ceb.bin
a9afa535f6beedca85d637d99c13a4b8409f906c102b35c62acf2db46398f57e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEB 17688 bytes
font_02_sfnt_off00009651.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9651 1708 bytes

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