Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc68a7f654c2ad3…

MALICIOUS

PDF

79.4 KB Authoring application: Nitro PDF
MD5: 21efafa4ff16ca5d069d930fe18a8d24 SHA-1: 8992bdb29837a0cb794e2d3f6b7ccc3a8a653496 SHA-256: 6cc68a7f654c2ad3646063f9f7bba0616c870933cbb4eda7549e373bdb9cff44
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a common technique for SEO poisoning and distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the embedded URLs suggest an attempt to redirect users to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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://northwayds.com/uploads/1/3/0/3/130323130/491a2163b.pdf
    • http://thefarmatcentralvillage.net/uploads/1/3/0/5/130590507/698229.pdf
    • http://angelavinson.com/uploads/1/3/0/3/130379463/8940d.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/6/130620912/130620912.html#samsung+sa350+driver+windows+7
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010f1.bin
bbd29076ebd575cdc0c3e06058ade90b55742eb4769323dfe12a30fcb5de15a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1 8884 bytes
font_01_sfnt_off00004597.bin
781ce1917a4e9608f2367fcc1b14b8942580789febec60abaf40bad98f6265c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4597 19232 bytes
font_02_sfnt_off0000630e.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 2616 bytes

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