Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd82223767b1371…

MALICIOUS

PDF

44.3 KB Authoring application: Adobe PDF Library 9.0
MD5: 3c1dd1d75701d3ee163cce82b04909f5 SHA-1: c808a93c2d98e645bb25985e199d9c034ab6ab08 SHA-256: edd82223767b13710a6d0310a40d609a146903f964be570bf8e1b45e7d537cf9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute malicious payloads. The heuristic 'PDF_SEO_LINK_FARM' directly indicates this behavior. The ClamAV detection further supports its malicious nature. The embedded URLs are the primary indicators of compromise, suggesting a phishing or content distribution scheme.

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://pipersnectar.com/uploads/1/3/0/6/130604793/f5e78d.pdf
    • http://gip.vet77.ru/uploads/2020/01/28/5640020.pdf
    • http://torreazul.es/uploads/1/3/0/6/130621385/fatibofug_mokaxotagexaz_xemiraxajilager.pdf
    • http://nnetherland.com/uploads/1/3/0/4/130435835/3480846.pdf
    • http://weluz.spec-techavto.ru/uploads/2020/01/27/5193243.pdf
    • http://testoimesto.ru/uploads/2020/01/29/jononir-rebavuzujamivez-tesebowu-nogiretotik.pdf
    • http://zanerotoxe.gesscsverde.site/uploads/2020/01/28/c07ded3dbd1.pdf
    • http://totahr.com/uploads/1/3/0/3/130323182/9268596.pdf
    • http://bejufom.mumi-dol.ru/uploads/2020/01/27/9312322.pdf
    • https://zoloxamaxari.weebly.com/uploads/1/3/0/5/130551006/vonojoli.pdf
    • http://ashishyadav.com/uploads/1/3/0/6/130639327/130639327.html#bmtc+bus+pass+form+online+2018

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000123b.bin
471a603e2bb65ce4abb7d1f3c1f1a879aa780f5cbaa85a5cedcce514a70ef097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123B 7696 bytes
font_01_sfnt_off000066ae.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AE 16068 bytes

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