Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fe22f3653207a2…

MALICIOUS

PDF

40.7 KB Authoring application: pdf-parser
MD5: 8485586b4eac941c75a3d445058b81b1 SHA-1: 896152611cb1f65880b76c984d290254d895f99c SHA-256: b1fe22f3653207a2cca068d9d63bd338437f70b00e3a45125fca317e4b6b7d1e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, with the primary domain being atozsmallbusinesservices.com. Additionally, a low-severity heuristic for SE_DOWNLOAD_BUTTON suggests a lure to encourage user interaction. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body, though heavily obfuscated, contains the primary malicious URL.

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://atozsmallbusinesservices.com/uploads/1/3/0/3/130379681/gekadapuximejum.pdf
    • https://nojegigetibuwu.weebly.com/uploads/1/3/0/3/130323271/6845787.pdf
    • http://davekuhn.com/uploads/1/3/0/2/130272905/3125078.pdf
    • http://jovijew.beabadocompositor.com/uploads/2020/01/28/kuxelafupisil-madafenabofumiz.pdf
    • http://nidinidi.com/uploads/1/3/0/7/130775997/xologobogubenebukut.pdf
    • http://missioncovenantyouth.org/uploads/1/3/0/4/130489833/fa58ea102b5.pdf
    • http://lincolnandkaty.com/uploads/1/3/0/2/130291724/wolejirafoge.pdf
    • http://bubblegumfantasies.com/uploads/1/3/0/8/130874371/guwizi_nurasetokaf_dakile_zijowisoxofagig.pdf
    • http://warubo.jornalistavitogemaque.com/uploads/2020/01/28/givivunivewe.pdf
    • http://shardexplorers.com/uploads/1/3/0/6/130621031/130621031.html#samsung+gt+n8000+android+version

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e5.bin
11d205bdea0539816bf1c00fd1e7d74ed0ab485b20e2f94621d98e66f8602cf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5 9132 bytes

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