Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df555913e9bc1e0…

MALICIOUS

PDF

33.8 KB Authoring application: OpenOffice Draw
MD5: 99c2b0bb488aba0d45e9f3c6994e8ef1 SHA-1: 3ecf4ba5509a91c73e860aeee35f8f77a3dace3a SHA-256: 8df555913e9bc1e0838680dd532f5f3baa5646296466cfaec9783c52c2ee7c34
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a phishing or traffic redirection campaign. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious activity.

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://brothersink.net/uploads/1/3/0/4/130488743/9877894.pdf
    • http://autodiscover.qoola.com/uploads/1/3/0/8/130813730/3209761.pdf
    • http://infoninja.net/uploads/1/3/0/6/130621024/9689d048d35.pdf
    • http://shkola2-0.com/uploads/1/3/0/3/130323155/1769781.pdf
    • http://luxairecares.net/uploads/1/3/0/6/130620892/6044365.pdf
    • http://www.nonswimfish.com/uploads/1/3/0/5/130539247/6951384.pdf
    • http://medicinaevolutiva.com/uploads/1/3/0/5/130544938/5363882.pdf
    • http://www.ashbourne-and-daly.com/uploads/1/3/0/8/130814063/576565937.pdf
    • http://thepacketpusher.net/uploads/1/3/0/7/130776405/9905450.pdf
    • http://cappel.la/uploads/1/3/0/4/130488370/1171703.pdf
    • http://qmcconsulting.fr/uploads/1/3/0/2/130288830/sizemosinokozujok.pdf
    • http://korthhardwoodfloors.com/uploads/1/3/0/3/130323291/b265ddaf23.pdf
    • http://www.bestbridalpricesct.com/uploads/1/3/0/6/130604521/vifepetoxe-devezorar.pdf
    • http://www.thebedspert.com/uploads/1/3/0/6/130603888/2884606.pdf
    • http://brawtabooks.com/uploads/1/3/0/6/130604311/130604311.html#how+to+find+font+of+text+in+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b72.bin
fa482468871ed627ce3d5584d6285c1f13d0330977ae6481ef71e4264702ac8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B72 7540 bytes

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