Malicious PDF — malware analysis report

Static analysis result for SHA-256 719ca820fa41bfc8…

MALICIOUS

PDF

42.6 KB Authoring application: Solid Converter PDF
MD5: 219e8650a7b168611838b6c272f46311 SHA-1: 21dfca3c5a118094086a0e0c1f514100e56ebd36 SHA-256: 719ca820fa41bfc8b66786aa7355670835eaadefb2e66224816c5a2b2275affb
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, indicative of a link farm or a distribution mechanism for further malicious content. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a critical heuristic identified a mass external PDF link farm. The embedded URLs are likely used to redirect users to malicious sites or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://arty-lab.com/uploads/1/3/0/6/130621317/dunuwadazudex-garibosoda.pdf
    • http://advancedbiocomputing.org/uploads/1/3/0/6/130640060/e8c85c29.pdf
    • http://dixiewillowdesigns.com/uploads/1/3/0/6/130604349/22e46c20da1ac7.pdf
    • http://mhftestpage.weebly.com/uploads/1/3/0/6/130621481/bowikirebo.pdf
    • http://valkyriesurfer.com/uploads/1/3/0/6/130620951/vixisufevijoji.pdf
    • http://oldtownimports.com/uploads/1/3/0/4/130435661/tazabatakasek-rimemelisir-mevojoxaxo-didupujux.pdf
    • http://galaxychocolates16.com/uploads/1/3/0/5/130543310/lozatumutajorim.pdf
    • http://krtucker.com/uploads/1/3/0/5/130588499/1019218.pdf
    • http://inglishmiqlana.com/uploads/1/3/0/2/130270799/kosikonarave.pdf
    • http://newstylemarket.com/uploads/1/3/0/6/130621814/130621814.html#vsco+app+free++for+android
    • http://linux.thai.net/projects/fonts-tlwg
    • http://www.thaitux.info

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001222.bin
10b2347a08797858455233d3c3d2220931b665334fe67d6a1d604c72e548686c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1222 8008 bytes
font_01_sfnt_off00005547.bin
825dbeb66390f26c2dafe519847c594efa5a0e14e1057cb529fb72653de9bbc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5547 13992 bytes

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