Malicious PDF — malware analysis report

Static analysis result for SHA-256 5433c775a555af6d…

MALICIOUS

PDF

47.8 KB Authoring application: Nitro PDF
MD5: 53b3981cfd27525f3d89e18c3d29e0b1 SHA-1: 80ae35e15782e3ea72c1449af54a4f251a57663e SHA-256: 5433c775a555af6d9f3279e3491826fcb580aeae6fcc15d61511c314f490d559
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious intent. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://northfieldpro.com/uploads/1/3/0/7/130739584/2470223.pdf
    • http://plikk.net/uploads/1/3/0/7/130775675/8401377.pdf
    • http://hele8yulechengwangzhi.f18.ebkf.org/uploads/1/3/0/5/130589186/zelanagago.pdf
    • http://akifujitani.com/uploads/1/3/0/7/130775622/9162990.pdf
    • http://shapnas.com/uploads/1/3/0/6/130639745/1663457.pdf
    • http://moobesity.com/uploads/1/3/0/6/130639173/9970727.pdf
    • http://thedistrictbistro.com/uploads/1/3/0/2/130271206/470159.pdf
    • http://hotgirlsofinstagram.com/uploads/1/3/0/5/130538959/walitater.pdf
    • http://bearvbaby.com/uploads/1/3/0/5/130588807/be94613c5e8dc6.pdf
    • http://acmehempcompany.com/uploads/1/3/0/5/130550901/mipiwaxevi.pdf
    • http://highcontents.com/uploads/1/3/0/7/130776474/duxof-zejuzaped-wifebinot-kefebikan.pdf
    • http://mytajfashionincorporated.com/uploads/1/3/0/6/130639445/3744593.pdf
    • http://benkipiyako.org/uploads/1/3/0/2/130289597/jufelinor.pdf
    • http://marshalinehandbt.org/uploads/1/3/0/5/130550824/2424011.pdf
    • http://recipetango.com/uploads/1/3/0/6/130604240/maxepajepubuke_bajodokor_kabosowivi_tirekagavaga.pdf
    • http://thegrampo.com/uploads/1/3/0/2/130288932/4818598.pdf
    • http://ororossodelmonferrato.com/uploads/1/3/0/2/130289638/lijugot.pdf
    • http://metroprointeriors.com/uploads/1/3/0/7/130775751/tiwisa_fufogaj_jalozowa.pdf
    • http://lynne-simpson.pleasingfood.com/uploads/1/3/0/8/130813369/130813369.html#english+basic+grammar+books

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ba2.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BA2 16312 bytes
font_01_sfnt_off000050ef.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50EF 2596 bytes
font_02_sfnt_off00005cb5.bin
2c87a5c2b1f74bb55abd2736c8617e67cf8a5b9acc635d382b07fc58d2e66bc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB5 8120 bytes

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