Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d9116e3f4d5124…

MALICIOUS

PDF

38.8 KB Authoring application: pdf-parser
MD5: 61b5f213789e18d356e7ce2621e916f4 SHA-1: b287c758e16fc46bfb95fdeb8fbb94c20b60232c SHA-256: f1d9116e3f4d5124b851df0538b8fd69ce571371478b0e34a817028ad0771800
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. This suggests a phishing or malware distribution campaign where the document acts as a gateway to a network of malicious sites. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.TtraffRobotInstall.

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://rainbowkids-okinawa.org/uploads/1/3/0/5/130589014/xugemilamofoma.pdf
    • http://rachelsaitzyk.com/uploads/1/3/0/6/130640114/bowoniz.pdf
    • http://thegoldengate.net/uploads/1/3/0/4/130489763/4e24434498bf1.pdf
    • http://serve10k.com/uploads/1/3/0/6/130604083/guzen-bekemuwado.pdf
    • http://caskmutation.org/uploads/1/3/0/2/130291358/xaronexinomesu_zufas_bebesigut.pdf
    • http://pet.brandmentore.com/uploads/2020/01/29/pifobojafonosifo.pdf
    • http://paulsmusicacademy.com/uploads/1/3/0/6/130621741/130621741.html#tic+toc+choc+couperin+youtube

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112c.bin
b8a24bf4e14ef69b63f4bcd165e8cee692ac2d354cfb2080279b57f88a6a274d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C 8716 bytes
font_01_sfnt_off00004749.bin
2d75eb7bc5c7fc5a72204c4b8a05cc4a5448a1fd64d8ff31e0975cea1d7bc4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4749 9792 bytes

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