Malicious PDF — malware analysis report

Static analysis result for SHA-256 d661337d76b2f59a…

MALICIOUS

PDF

42.4 KB Authoring application: Smallpdf Desktop
MD5: 30468307ea7bfff3cd43772ffa62bcad SHA-1: 1ff20ef2779dd27628200c587d67e9d695df333b SHA-256: d661337d76b2f59a8545ff641c0cc0774170df55ca7c2751b83468a45cc52365
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or SEO manipulation tactic. The embedded URLs likely serve as lures or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://allieplatt.com/uploads/1/3/0/6/130621673/xapizugadakatid.pdf
    • http://liftuplab.com/uploads/1/3/0/5/130539922/lojukepu.pdf
    • http://pruritusresearch.net/uploads/1/3/0/5/130551087/72538.pdf
    • http://amksecurities.com/uploads/1/3/0/4/130488780/6574435.pdf
    • http://aimpointprojects.com/uploads/1/3/0/5/130590019/7ab47633e6b19.pdf
    • http://xakesa.eshorttech.com/uploads/2020/01/28/liwinuvexavipe.pdf
    • http://crankworthymusic.com/uploads/1/3/0/2/130270799/tovavofuwegibom.pdf
    • http://danoboots.com/uploads/1/3/0/5/130590567/1710207.pdf
    • http://meritcardmoapp.com/uploads/1/3/0/2/130287815/nowuzuvaga.pdf
    • http://nancyleong.com/uploads/1/3/0/6/130640015/3313484.pdf
    • http://onlinehomemyaccsupport706.com/uploads/1/3/0/4/130483376/130483376.html#define+sample+answer

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011f7.bin
1597e087e7125aa9daa8972465c3af2fae0aa3b3c094e66ffd51eba21b3e20ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7 8144 bytes

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