Malicious PDF — malware analysis report

Static analysis result for SHA-256 03335004b4e87220…

MALICIOUS

PDF

41.1 KB Authoring application: SWFTools
MD5: 15481cc52ae8aaa43bad9ea2543de2d5 SHA-1: fae86108b04bd9b897eb3373e7a1b19723865456 SHA-256: 03335004b4e872203a25eb1a4237242fad970dd0a4e8a6f939d9dbe5cf2d388c
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 hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also strongly indicate malicious intent. While no scripts were directly extracted, the embedded URLs are the primary indicators of compromise.

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://aimeelora.com/uploads/1/3/0/6/130622091/9784579.pdf
    • http://portlandareainjury.com/uploads/1/3/0/4/130488970/jived-dufekig-rusatizive-wagepovikik.pdf
    • http://aestheticsplus.co/uploads/1/3/0/2/130270752/7237302.pdf
    • http://northcountryhomeinspection.com/uploads/1/3/0/2/130274304/tewizokorizefibom.pdf
    • http://ajhomecooking.com/uploads/1/3/0/6/130620823/3913516.pdf
    • http://madamemodica.com/uploads/1/3/0/2/130270914/waginanifuse.pdf
    • http://ndchair.com/uploads/1/3/0/6/130621277/130621277.html#funny+answers+for+how+old+are+you

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001126.bin
695352f7ae7b2ce571bf43015020ff5990807ace42c6a8d999ec91a21089d583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1126 8504 bytes

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