Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8aceb20fd98b300…

MALICIOUS

PDF

35.9 KB Authoring application: Nitro PDF
MD5: 4dea78dfc782ecb45f9f13f61ea8666e SHA-1: 7961b7fd6355c1d3ab8009e5fc8b42e8ce1e6fa3 SHA-256: b8aceb20fd98b300cc01712fd8ae700ac021bb469987d6cceac46296e558ef75
120 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. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. No scripts were extracted from this sample, limiting the ability to determine specific execution techniques.

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://oaktonavenuelaw.com/uploads/1/3/0/6/130604321/e0381a729cc.pdf
    • http://dragonflylivestockranch.com/uploads/1/3/0/4/130436165/luwavob.pdf
    • http://vpstestsite.com/uploads/1/3/0/3/130323794/3944952.pdf
    • http://missbehave.website/uploads/1/3/0/7/130739405/vilisepogeruma.pdf
    • http://darafruchter.com/uploads/1/3/0/5/130543366/fidafozozukejid.pdf
    • http://kurokobrothers.com/uploads/1/3/0/2/130287735/dipisex.pdf
    • http://anatoly-nikolsky.com/uploads/1/3/0/7/130775876/f2fa4d793.pdf
    • http://funeralderangements.com/uploads/1/3/0/3/130313700/4290654.pdf
    • http://zenfeather.org/uploads/1/3/0/7/130740080/550709.pdf
    • http://uberscrudu.com/uploads/1/3/0/6/130620859/kulij_xoruwu.pdf
    • http://nobubarcelona-emea-es.devsite-1.com/uploads/1/3/0/6/130639397/130639397.html#ielts+speaking+questions+music

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003645.bin
1f01586b60096d39f09996cdd76391e57695d49eac9ad7a8aaa35d2324d62223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3645 8000 bytes

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