Malicious PDF — malware analysis report

Static analysis result for SHA-256 c121fc54009bde91…

MALICIOUS

PDF

46.0 KB Authoring application: pdf-parser
MD5: 77326eabd306ef4684946fa788ae6ce9 SHA-1: 9e8b0cea268aa0bf6c908e242b5073dd7a12744d SHA-256: c121fc54009bde91ee1bebf8ab8836139902255a5af854465b3f5eeb97c730ba
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body, while containing garbled text, also includes URLs that are part of this link farm, reinforcing the attack pattern.

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://nzhcoined.weebly.com/uploads/1/3/0/6/130620796/4546867.pdf
    • http://bima.best-of-world.ru/uploads/2020/01/29/f9a70637a57.pdf
    • http://dakotanaturalgoods.com/uploads/1/3/0/6/130604576/zebopunogasu.pdf
    • http://wysiwygfilms.com/uploads/1/3/0/4/130483350/nivuvipokaf.pdf
    • http://expopul.com/uploads/1/3/0/5/130546742/0001895135bbb.pdf
    • http://nilaskanltd.com/uploads/1/3/0/6/130621298/4000894.pdf
    • http://bcsgrubbox.com/uploads/1/3/0/4/130483487/jozozulufuzu.pdf
    • http://mrstodd.net/uploads/1/3/0/5/130588251/rusegusage_naduref_futuxagig_volis.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/2/130289557/130289557.html#battery+charger+circuit+diagram+with+auto+cut+off

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000122d.bin
fbc8e8773eb9739442913ec5a218db5843168048049fc4e1205d7d7e3da0f3c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D 8864 bytes
font_01_sfnt_off000078cc.bin
cfb3357b20fb01955c1e4a0ed568c791e3a97db8f0fbaa18432a833eaa1d19da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CC 2828 bytes

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