Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5a13cbb98fddf5…

MALICIOUS

PDF

36.0 KB Authoring application: Pdftk
MD5: ee55f46563f2c52dc05d8a70aca0763b SHA-1: 623fb48756337bec3e0dee5ae775cb14f9722768 SHA-256: 7d5a13cbb98fddf5c6483a01bd79aad78fc636ea5e9d6f405ff900454c7b6149
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV specifically identifying it as Pdf.Phishing.TtraffRobotInstall. The document body, though heavily obfuscated, contains references to URLs that are consistent with a link farm or redirection scheme. The primary attack pattern involves directing users to external resources through these numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://dftransportes.com/uploads/1/3/0/7/130739602/4650885.pdf
    • http://britemoonmarketing.com/uploads/1/3/0/4/130436188/seturu-wefoturirariwu.pdf
    • http://ubs-taxfree-puertorico.com/uploads/1/3/0/2/130270831/lakozi.pdf
    • http://ohanaguidance.com/uploads/1/3/0/6/130604515/finaragudozan.pdf
    • http://bayareasomaticpsychotherapy.com/uploads/1/3/0/3/130323602/473130c2.pdf
    • http://msidec.com/uploads/1/3/0/2/130291838/61e18e8e3.pdf
    • http://nelancasterhub.org/uploads/1/3/0/8/130814643/muxekax.pdf
    • http://howmuchtrip.com/uploads/1/3/0/7/130775245/sapodixokufeg.pdf
    • http://swimprofessionals.co.nz/uploads/1/3/0/7/130739930/49481357b72dc.pdf
    • http://slsfnc.com/uploads/1/3/0/2/130271081/xixinisasuvemu-xirodapomej-sitafu.pdf
    • http://cinn-fullydelicious.com/uploads/1/3/0/4/130477414/8068693.pdf
    • http://monicatunnell.com/uploads/1/3/0/6/130620492/nuder.pdf
    • http://clogdancing.me/uploads/1/3/0/6/130620712/5136636.pdf
    • http://momentumva.com/uploads/1/3/0/6/130622092/0be38d.pdf
    • http://freecourts.com/uploads/1/3/0/7/130775751/lexivaloxi_piguwaluzu.pdf
    • http://drewgrahamart.com/uploads/1/3/0/4/130477613/c935433.pdf
    • http://sarasotabicycles.com/uploads/1/3/0/5/130551253/7237727.pdf
    • http://fashiontrendingstyles.com/uploads/1/3/0/5/130551864/dd105e56.pdf
    • http://countrystylebbqcatering.com/uploads/1/3/0/6/130604002/sekow-luvexekiziwifo.pdf
    • http://3vgfj.bpmtc.com/uploads/1/3/0/2/130270812/130270812.html#chlamydia+test+kit+male

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb1.bin
2305f00fa7e3ddb65171bbb0a94a1b9b38c39a37aea293ef58cde5c549b74a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB1 7804 bytes

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