Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6fa3bf18a49b4b…

MALICIOUS

PDF

40.5 KB Authoring application: Pdftk
MD5: 897d49b0cf63ef8395cd00366540d078 SHA-1: 97b8f207ce548d6ef1c38dc1109048935ffe1850 SHA-256: ac6fa3bf18a49b4b27c22f1340d247c567c4ac26b1767bc7386bcb6c7a620adb
120 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of embedded external links, indicating a link farm designed to redirect users to potentially malicious content. The primary heuristic firing, PDF_SEO_LINK_FARM, directly supports this observation. The embedded URLs are the highest priority IOCs for further investigation.

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://skunkremovalknoxville.com/uploads/1/3/0/5/130551324/mimelor.pdf
    • http://t5only.com/uploads/1/3/0/2/130288710/subisu.pdf
    • http://workingtowardzero.com/uploads/1/3/0/4/130483647/2243078.pdf
    • http://cynicalpicnic.com/uploads/1/3/0/5/130539373/puxem_lufepobux_zoluwer_lonug.pdf
    • http://ubezpieczenia-mk-koszalin.pl/uploads/1/3/0/5/130539886/eb3443.pdf
    • http://sjhameed.com/uploads/1/3/0/7/130776756/8e86c41.pdf
    • http://ncslp.com/uploads/1/3/0/6/130604637/710fbc.pdf
    • http://sublimeinstantlift.com/uploads/1/3/0/2/130271184/5b6239ef89a37e8.pdf
    • http://hyuk.info/uploads/1/3/0/4/130436130/nugasugo.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/4/130436521/130436521.html#dil+tera+deewana+1962

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e2.bin
7cbeede7c2623fc02ceea483f012c488dfaacd3c43088922b2508c90cae71e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2 8304 bytes
font_01_sfnt_off00005086.bin
e83712f63038246dea8abc89a298832cddddd6a540d2d7ea5db5ecce8899b48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5086 18372 bytes

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