Malicious PDF — malware analysis report

Static analysis result for SHA-256 7386fcfd21bbf453…

MALICIOUS

PDF

57.0 KB Authoring application: QPDF
MD5: 550d09a6e2c61a49d2ebca7a8f0fdec2 SHA-1: 2b24ab03d5f08bf7c85de9d68dc42e0cc1b4066d SHA-256: 7386fcfd21bbf45342c43b714ac132d199af0630146ce38e58c299104427a240
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, pointing to other PDF files. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent, likely for phishing or distributing further malware. The document body also contains embedded URLs, reinforcing the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wotitativu.sargarmoshka.ru/uploads/2020/01/27/432109.pdf
    • http://vidifazo.atlla.ru/uploads/2020/01/28/lexazaweriz.pdf
    • https://tezupeduw.weebly.com/uploads/1/3/0/3/130313307/360bb162d.pdf
    • http://mybest30minutes.com/uploads/1/3/0/2/130289558/sipawilerabimu-sitebokaxejusan.pdf
    • http://pewaba.amazon-sellers-check.com/uploads/2020/01/27/304911.pdf
    • http://qbedsandbedding.com/uploads/1/3/0/2/130289397/818747.pdf
    • http://jtbeidencharles.com/uploads/1/3/0/6/130621033/e561d7.pdf
    • http://pewirugune.ayazshabutdinov.biz/uploads/2020/01/28/badevoterum-rakalebure-lobasize-rebulisovupol.pdf
    • http://suzukisingandplay.com/uploads/1/3/0/3/130323207/wameferapuxez.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/5/130588913/130588913.html#sites+to++free+movies+directly

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000129d.bin
8a7cd698fe021f80d46badf512039777450e1d964190094a64df09543e664776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129D 8180 bytes

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