Malicious PDF — malware analysis report

Static analysis result for SHA-256 898f3621449bd777…

MALICIOUS

PDF

34.3 KB Authoring application: PDFBox
MD5: 61d8af0902f25d640fa1cd947d495d46 SHA-1: fa4ba601582c4261779fba3a244b2f030b0e14c7 SHA-256: 898f3621449bd7777b7feea2a13d44062bdbf04059ecf48b4e1c6d627e1890e3
120 Risk Score

Malware Insights

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

The PDF file contains a link farm with multiple embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection further confirms its malicious nature, specifically flagging it as Pdf.Phishing.TtraffRobotInstall. The document body, while appearing to be a worksheet, is a lure to disguise the malicious intent of directing users to download further malicious content from the provided URLs.

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 https://temunaxaxun.weebly.com/uploads/1/3/0/4/130436365/terafunijo.pdf
    • http://stthomastheapostleparishmontfortwi.com/uploads/1/3/0/5/130588858/jerotakawitiz.pdf
    • http://soleiltranslation.com/uploads/1/3/0/4/130435930/99b49e236af.pdf
    • http://xavapufo.misstourist.net/uploads/2020/01/28/ff353068c72cc.pdf
    • http://johanneslavertonrestaurant.com/uploads/1/3/0/3/130324416/6539155.pdf
    • http://toniabasihill.com/uploads/1/3/0/2/130289620/lulugeduf-wegivalegifen-jowakovig-dibim.pdf
    • http://mikeintucson.com/uploads/1/3/0/6/130604988/130604988.html#distributive+law+worksheet+year+7

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001164.bin
5adfdc53d68c84425e62b85a4ac1cc2767c5e4d081e44fbffbbef7e80a904fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1164 8616 bytes
font_01_sfnt_off00004aa6.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA6 2652 bytes

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