Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d147e742fc6f59…

MALICIOUS

PDF

37.1 KB Authoring application: Inkscape
MD5: d9e500cdae6cbede73a0fb1329a04b5e SHA-1: 19660895df2af71f4947a19ec8724a88705bf2c0 SHA-256: a8d147e742fc6f59bacca1a6b5b25d4ceaf19acf603d738c8344a8cfd0283f5c
128 Risk Score

Malware Insights

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

The PDF file contains a link farm with multiple external PDF URLs, suggesting a phishing or malicious redirection attempt. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the presence of a visual download button further support a malicious intent. The document body, though heavily obfuscated, contains references to 'Usatestprep answer key reading' which could be a lure. The primary attack pattern involves tricking the user into clicking links that lead to further malicious content.

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 https://zabetegikajida.weebly.com/uploads/1/3/0/6/130604226/3760a.pdf
    • http://nekimastrategy.com/uploads/1/3/0/5/130542866/c1aaaf24.pdf
    • http://deraadgevers.com/uploads/1/3/0/6/130604154/vazifiwuwibi.pdf
    • http://bes.pushkino-narkologiya.ru/uploads/2020/01/27/b3c61.pdf
    • http://peputpenkkiin.fi/uploads/1/3/0/3/130313022/1bac1.pdf
    • http://jowutapu.wondersaw.ru/uploads/2020/01/28/4688342.pdf
    • http://losexi.tomrich.ru/uploads/2020/01/27/mutosakidotebo.pdf
    • http://zovugominu.wedid.ru/uploads/2020/01/27/348852f02f5.pdf
    • http://savemorecy.weebly.com/uploads/1/3/0/5/130551935/130551935.html#usatestprep+answer+key+reading

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001127.bin
ef898456b3ac126d3c05ae357eb6c35ca7cc514b45fc9924464e5a83c68eef5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1127 7784 bytes
font_01_sfnt_off00004a0e.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0E 16068 bytes

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