Malicious PDF — malware analysis report

Static analysis result for SHA-256 950d105f828dd87a…

MALICIOUS

PDF

64.1 KB Authoring application: Poppler-utils
MD5: 0648aeb929da8af372e32bfd35a8204b SHA-1: 8c0f99b68c3b527a60806ebe6ae25795b2b98edc SHA-256: 950d105f828dd87af2f833c26792844546143175b2aa1dca0cb932cc6188e084
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic specifically identified a large number of external links pointing to other PDF files, suggesting a link farm or distribution mechanism. The embedded URLs are the primary IOCs, likely leading to further malicious content or phishing pages.

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 http://veteransmusicfest.com/uploads/1/3/0/5/130550783/faluruxa.pdf
    • http://tattletalesboutique.com/uploads/1/3/0/5/130550770/5f0c5c24ca4ea6.pdf
    • http://jof.vipdating.icu/uploads/2020/01/27/cd6052d4a960.pdf
    • http://aljbrand.com/uploads/1/3/0/5/130550790/sazewanizup-niwafivibugito-tivopopivig-zezejisuwim.pdf
    • http://nifebijas.forexinaustralia.club/uploads/2020/01/27/6349175.pdf
    • http://appmakerinc.com/uploads/1/3/0/4/130436337/3351334.pdf
    • http://molizu.raz-ezzhaya.ru/uploads/2020/01/28/c731a782b.pdf
    • http://theekklesiacenter.com/uploads/1/3/0/6/130605283/lukorosugazewasaret.pdf
    • https://tedulidage.weebly.com/uploads/1/3/0/4/130476339/fupewokubazitatejo.pdf
    • https://vopabibejo.weebly.com/uploads/1/3/0/4/130476266/gobiwi_sowafapup_vulikubojaropa.pdf
    • http://reneeleaberger.com/uploads/1/3/0/6/130639141/9165859.pdf
    • https://webosaxopeniluz.weebly.com/uploads/1/3/0/2/130288893/dagoranuw.pdf
    • http://tcsonline.net/uploads/1/3/0/6/130604775/130604775.html#t%E1%BA%A3i+adobe+animate+cc+2015+full+crack

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016d7.bin
3bcff548bd51616e72bd06f6771d099499b108ec118db30341301a77acfc2e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D7 12108 bytes
font_01_sfnt_off0000ac1d.bin
5f9b66b434d69d573fb4ecf612a2beccfdd2ffe087e466b70631e8fe25f791e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC1D 24428 bytes

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