Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b5775d55a9a77e…

MALICIOUS

PDF

84.2 KB Authoring application: GIMP
MD5: bd9908fe0a5284be15db0a66507c964e SHA-1: dede5c93a8fdaada42112a847271d5a8b36f43c0 SHA-256: 97b5775d55a9a77eab61fbec2e8a919caa9d00c19adb70ffc558dffc57ba4129
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted from this sample, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://kavid.ca/uploads/1/3/0/5/130551554/4aa8b004cef292.pdf
    • http://myrachelnewman.com/uploads/1/3/0/4/130483402/konatevuz.pdf
    • http://quotes180.com/uploads/1/3/0/4/130476244/litonazasareduvet.pdf
    • http://mrssheltonsclassroomeghs.com/uploads/1/3/0/2/130289428/02644b60b.pdf
    • http://walkermoore.org/uploads/1/3/0/5/130590122/wugiwa.pdf
    • http://greatwebsitebuilder.com/uploads/1/3/0/5/130551586/5513471.pdf
    • http://bordercollieevents.nl/uploads/1/3/0/4/130483918/38355e17d8.pdf
    • http://morjanaspain.com/uploads/1/3/0/5/130588545/motisuwasomusivane.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/5/130550768/130550768.html#objets+c%C3%A9lestes+du+syst%C3%A8me+solaire

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001351.bin
4e10a2a1b704b7701a3b96d9bf8b9c3de564cbd16df84d9fc794f60bb3135b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1351 11492 bytes
font_01_sfnt_off00007764.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 2652 bytes
font_02_sfnt_off00008054.bin
85d884f9d28b92fdafce95edb0ea88e6b7da9e7369fee159b0a45294b7f22506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 16200 bytes

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