Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4520ad35f4b6d34…

MALICIOUS

PDF

46.0 KB Authoring application: Scribus
MD5: 9aafc0d47a3fce90a169e6e0a3cb030c SHA-1: 7212f19376b2d8e1b4283562d62c0c82cb479237 SHA-256: c4520ad35f4b6d347f3d51cf3ed0b686787fe40292f36037e6cba9f03c5dc6ad
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a link farm designed to redirect users to various malicious PDF files, masquerading as a Java 8 tutorial. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' confirms its malicious nature. The embedded URLs are the primary indicators of the attack, likely serving as a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://discovercaddogap.com/uploads/1/3/0/2/130274338/livatojiwipeso.pdf
    • http://blackbirdsreply.com/uploads/1/3/0/6/130620982/misuritav-dufid.pdf
    • http://hostmaster.darianicolodi.net/uploads/1/3/0/6/130621643/xajukezafe_vutusu.pdf
    • http://power4lifenow.com/uploads/1/3/0/3/130313698/zozazeki.pdf
    • http://harlembarcrawl.com/uploads/1/3/0/4/130489465/8c6a1dacf111a98.pdf
    • http://neverdonefiberfarms.com/uploads/1/3/0/6/130604650/wibakoduviwox.pdf
    • http://stampexinternational.com/uploads/1/3/0/6/130604681/4831475.pdf
    • http://beatologystudios.com/uploads/1/3/0/6/130621656/nemamuxedabuxu-xibanapera.pdf
    • http://mylittlecutfootcabin.com/uploads/1/3/0/7/130739731/36c7a717a1686.pdf
    • http://pixldoc.com/uploads/1/3/0/3/130323187/3902798.pdf
    • http://www.morethansoulfood.net/uploads/1/3/0/6/130604515/130604515.html#java+8+tutorial+pdf+download
    • http://hostmaster

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005de3.bin
c8dd3a6c8cf38a80e7a1476eda69d0915f4a6451e1a83e1077d111411a88b0d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE3 8152 bytes

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