Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f280a4d41ade0e…

MALICIOUS

PDF

38.4 KB Authoring application: PDF Studio
MD5: 72e0b4d1b829512ac2f2d520ef772e58 SHA-1: 72183ff691859e9601f0c98d827ad069c7a36296 SHA-256: b2f280a4d41ade0e18ddbb065a3745e3a20e4ec8135afde88d7cf95334739d2d
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a malicious intent. The document body, while containing some seemingly benign text about voicemail greetings, also includes the same list of suspicious URLs, reinforcing the link farm attack pattern.

Heuristics 4

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ambermayde.shop/uploads/1/3/0/6/130621279/badalil-tonafal.pdf
    • http://jugonus.morevideo.ru/uploads/2020/01/28/ab5c12.pdf
    • http://baxifuvaje.za-rya.ru/uploads/2020/01/28/029df4351dfd01.pdf
    • http://mercedes-huff.com/uploads/1/3/0/5/130543019/kigezarekuzij-niwado.pdf
    • http://stephenshooster.com/uploads/1/3/0/2/130271171/ziladosevop.pdf
    • http://xojigan.smokerate.ru/uploads/2020/01/29/02aa7524b3936ec.pdf
    • http://unsubscribetoviolence.com/uploads/1/3/0/2/130289222/bigof-sanuwufedanoru-pudekozuwemu.pdf
    • http://12ministries.org/uploads/1/3/0/5/130588607/jibebopufoburowaw.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/7/130776126/130776126.html#spanish+voicemail+greeting+template

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000121a.bin
b09ca174b04e47bd8ebf1cbf8aa5fa31e9f7ecf960eb458330b78dfcedb55819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121A 8560 bytes

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