Malicious PDF — malware analysis report

Static analysis result for SHA-256 f817cef9ad558ae4…

MALICIOUS

PDF

43.3 KB Authoring application: ImageMagick
MD5: 0a0cf4f98f7cf42de14d9ad85b15046d SHA-1: 1cb473712506319e5e2e8ce7f687e8534ddd1cd8 SHA-256: f817cef9ad558ae4863e8951a14f90390f7683f5642c7597a0a1294ad12c5f94
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. A critical heuristic identified a large number of external PDF links, suggesting a link farm for SEO manipulation or malware distribution. The embedded URLs, though many are confirmed benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://wefexatipenikeb.weebly.com/uploads/1/3/0/3/130313433/6750569a.pdf
    • http://taiguantravel.com/uploads/1/3/0/5/130590550/6271322.pdf
    • https://vijirenepejix.weebly.com/uploads/1/3/0/5/130589057/8725292.pdf
    • http://alexraco.org/uploads/1/3/0/4/130477882/bejakilepexoje-bepapajetara-mirebe-tepopikava.pdf
    • http://stlouistriathlon.com/uploads/1/3/0/5/130588754/vifefuxopeviponusi.pdf
    • http://sobuzute.trilo.icu/uploads/2020/01/27/fifokep_laxuwamakig_woduzapodiw_bexukebap.pdf
    • http://baygrownfarms.com/uploads/1/3/0/5/130543020/b295ca0904d1998.pdf
    • http://compressionsuorce.com/uploads/1/3/0/5/130543305/c3fe30116d2.pdf
    • http://ccocciboutique.com/uploads/1/3/0/5/130551445/2716100.pdf
    • http://gukud.megadrom.info/uploads/2020/01/27/megiwixigirapuloxal.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/6/130621819/130621819.html#viscosim%C3%A8tre+%C3%A0+chute+de+bille

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000135e.bin
cc47b64dc6a918edf7c76c95cb4faee0febf308a6fa5d1c1a71fee91c8725f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135E 10168 bytes
font_01_sfnt_off00005723.bin
b080e6aa9682ff87567a230b404ab00780bafcfd3ba11e3f536b788ca6e08ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5723 16060 bytes
font_02_sfnt_off00006b92.bin
519d61dc10ecf4bcf6cb915d96c7d4e391da4f87ade4f55e673f603ff339198c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B92 3372 bytes

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