Malicious PDF — malware analysis report

Static analysis result for SHA-256 73614d0d889a551a…

MALICIOUS

PDF

40.9 KB Authoring application: Smallpdf Desktop
MD5: 6fa442daca2561268e6ae1291bd008a2 SHA-1: e79c0a8d0988d44264dff7103f7a791c7a7a71f2 SHA-256: 73614d0d889a551a7e50934f1770f1904e2443715e877284d3e531e50d06e656
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection mechanism. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent, likely related to phishing or distributing further malicious content. No scripts were extracted, but 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://1017bud.com/uploads/1/3/0/6/130639177/lofotipine.pdf
    • http://kingswoodsquare.com.au/uploads/1/3/0/7/130739285/3206630.pdf
    • http://sprinkledcompany.com/uploads/1/3/0/3/130379814/sulozewesibexazuw.pdf
    • http://simple-dimensions.com/uploads/1/3/0/5/130540799/8474661.pdf
    • http://comparefoldersapp.com/uploads/1/3/0/5/130551335/fariwusorediwum.pdf
    • http://eunoiatherapysd.com/uploads/1/3/0/4/130483804/430696.pdf
    • http://nurseontherun.net/uploads/1/3/0/6/130604300/zomapetojusoxaz.pdf
    • http://carolpunt.com/uploads/1/3/0/6/130639309/476058b234ccf5.pdf
    • http://beverlywilshire.org/uploads/1/3/0/4/130483875/birigegikexabux.pdf
    • http://ryansjewelryshop.com/uploads/1/3/0/6/130620759/rowovufen_mivef_jituwipibeva.pdf
    • http://chopstir.com/uploads/1/3/0/3/130324164/verelevetejej.pdf
    • http://abyss37.pleasingfood.com/uploads/1/3/0/6/130604411/130604411.html#o+que+%C3%A9+aspartato+aminotransferase-+ast+tgo+ou+tgp
    • 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_off0000301f.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x301F 16036 bytes
font_01_sfnt_off0000479c.bin
5c733d8a56298bc5e4cc09e2ccd92d4246b862739f85bf5a3896acdab2cb1f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x479C 9856 bytes

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