Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cda47174b89cf0…

MALICIOUS

PDF

43.5 KB Authoring application: PDFBox
MD5: bb56723c5eb3d480c7a7e071d4c9a183 SHA-1: d5627f2877f8465c863fb32141407c6f636ab85e SHA-256: 13cda47174b89cf0fbcc240efcf3c4f62869bde0337628ebb736c066d3ab2d2a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and an ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for further malicious activity or redirection.

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://jannarasanen.com/uploads/1/3/0/8/130813770/e0a984.pdf
    • http://freeatx.com/uploads/1/3/0/6/130604740/5848208.pdf
    • http://conquermarketing.org/uploads/1/3/0/6/130639251/8692007.pdf
    • http://mywholelifeisshirts.com/uploads/1/3/0/6/130639240/8d0bc692b.pdf
    • http://darkmediaguy.com/uploads/1/3/0/7/130775921/4313362.pdf
    • http://nuditosytrapitos.com/uploads/1/3/0/6/130639693/78d2769ae7c.pdf
    • http://centerforculturalfitness.org/uploads/1/3/0/6/130639841/7262500.pdf
    • http://norcal-cre.com/uploads/1/3/0/7/130740264/76ddf590d3f3.pdf
    • http://www.acadianamemories.com/uploads/1/3/0/5/130551008/be57e6ce.pdf
    • http://firstbookonline.net/uploads/1/3/0/4/130435715/fezeti-jakegiminuf-lipebubalexokin.pdf
    • http://newcityvintage.com/uploads/1/3/0/5/130539243/lepepigosimerusutumi.pdf
    • http://australianinteriorsdesign.org/uploads/1/3/0/3/130323421/rijisewijuvumovibi.pdf
    • http://ourlibertypark.net/uploads/1/3/0/8/130813956/dodere.pdf
    • http://getdirtygirl.com/uploads/1/3/0/6/130639357/3318268.pdf
    • http://utahwineschool.com/uploads/1/3/0/6/130639397/9549892.pdf
    • http://retrofitmetalroofing.com/uploads/1/3/0/7/130739661/1742352.pdf
    • http://soytacos.com/uploads/1/3/0/6/130639337/lovazidop.pdf
    • http://mta-sts.mx.neckprosperity.org/uploads/1/3/0/5/130540197/goxalufafozisu_sufeto_wedad_xebajufufiv.pdf
    • http://meat-taffy.org/uploads/1/3/0/7/130739495/0cb17325498350.pdf
    • http://nymantechnologies.net/uploads/1/3/0/8/130874368/d0dad46.pdf
    • http://www.ten27.shop/uploads/1/3/0/7/130776037/sejugezewom.pdf
    • http://ullaskitchen.com/uploads/1/3/0/8/130874161/muxeruvum.pdf
    • http://74-123-73-216.mgwnet.com/uploads/1/3/0/3/130323453/130323453.html#feroz+ul+lughat+urdu+to+urdu+dictionary+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f40.bin
c9e72ab8b851025e9a0307b1a95ae21c4e9350f3d8e9f0d45d15931883cef68d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F40 16752 bytes
font_01_sfnt_off00004947.bin
d80dfe3057788a263d5fe9ce1cee8371fdd1197d9717b3fd24e0bf5aec36182d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4947 7728 bytes

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