Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6a7f4a1a3aa4bf…

MALICIOUS

PDF

56.4 KB Authoring application: Inkscape
MD5: a0a0f98112061373e4e0336393910a86 SHA-1: 4e40ea48c893f3cec55c11b8334cbdfc996f95c3 SHA-256: 3c6a7f4a1a3aa4bff03959cccbbfd143858c76182ee78cdff23de4460badbf33
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule, indicating a large number of external links. The ML classifier also assigned a high probability of maliciousness. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. The embedded URLs likely lead to further stages of a phishing campaign or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://motivationalresearch.org/uploads/1/3/0/6/130621900/tevoj-jorukes-lebavatojajula.pdf
    • http://tungemmy.store/uploads/1/3/0/6/130604192/funavoxa_jusev_kilivex.pdf
    • http://jobsholic.com/uploads/1/3/0/5/130550664/bacbb.pdf
    • http://realedchat.com/uploads/1/3/0/2/130271167/xunuf-talotomerexut-bejepimekete-tigaj.pdf
    • http://thediplip.com/uploads/1/3/0/5/130590777/demuvorolerawir-lepuselalu-nisowid-korakexabenuj.pdf
    • http://smartpromoting.com/uploads/1/3/0/7/130740561/7694862.pdf
    • http://agapa.net/uploads/1/3/0/4/130477775/8212400.pdf
    • http://ne-surgerycenter.net/uploads/1/3/0/4/130488412/130488412.html#tefbis+tahmini+b%C3%BCt%C3%A7e

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ad.bin
b961569858e84dc0db635ea3b20108fd0c6fbbf90ad5907c4c8ca1a153a4068f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD 10512 bytes
font_01_sfnt_off0000961f.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x961F 16268 bytes

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