Malicious PDF — malware analysis report

Static analysis result for SHA-256 db00a8cb9c355d6b…

MALICIOUS

PDF

43.0 KB Authoring application: pstoedit
MD5: 360bbb16cf1cc898670f1c0bf3a0bab6 SHA-1: 8336ebf75f7cbba9f76ade5126342d92adcf8d00 SHA-256: db00a8cb9c355d6bbe0d6ac8a4734887112773bcb6c6a2d39ef93e23dd34067d
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a machine learning classifier returned a score of 0.999967. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external PDF links, with the first being http://powerstrokeconcepts.com/uploads/1/3/0/6/130639935/608154.pdf. This suggests the document's primary purpose is to redirect users to a network of malicious or phishing sites disguised as PDF documents.

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://powerstrokeconcepts.com/uploads/1/3/0/6/130639935/608154.pdf
    • http://sandandgraveldelivery.com/uploads/1/3/0/5/130550785/159aa0e2dfdb1d.pdf
    • http://bumbleandsprout.com/uploads/1/3/0/5/130539204/jaxil.pdf
    • http://eskdalefalconry.co.uk/uploads/1/3/0/4/130491075/lajavevo-suwilivabib.pdf
    • http://plumbingleakprotection.com/uploads/1/3/0/4/130483417/faluxelugovepote.pdf
    • http://lclreporter.com/uploads/1/3/0/5/130540420/8316851.pdf
    • http://mindbodsoul.com/uploads/1/3/0/4/130483634/nemuxisu.pdf
    • https://rozikunimozos.weebly.com/uploads/1/3/0/2/130272247/panofevudadetas_fumobusevirex_ninalorefowozad_medokod.pdf
    • http://cookiecrumbleslimes.com/uploads/1/3/0/3/130313309/5306051.pdf
    • http://mynaturalhairspa.com/uploads/1/3/0/4/130488294/130488294.html#masked+singer+flamingo+lady+marmalade+performance

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001486.bin
1a58e11ddb4bfeda479cd7006ec30a30568ba0a9efdc330e67d14eee47fc9ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1486 8600 bytes
font_01_sfnt_off000061de.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 16036 bytes

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