Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd6161b7b735386…

MALICIOUS

PDF

39.3 KB Authoring application: PDFBox
MD5: b5062704f1fc367baceaee7f93c59411 SHA-1: 8380cc3d3b6839d53ac4a99aa679beb4717abe78 SHA-256: ecd6161b7b73538648bd7ac93d9c5a1bbcc9ac85fb6edaf2d52228b501bed697
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. ClamAV also identified this as Pdf.Phishing.TtraffRobotInstall, suggesting a phishing or traffic-generating intent. The embedded URLs are likely used to redirect users to malicious sites or to manipulate search engine rankings.

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://tamufofaxedosul.weebly.com/uploads/1/3/0/4/130483537/kazovumusop_zamiven_sapetam.pdf
    • http://nokutisif.svea.pro/uploads/2020/01/27/7566032.pdf
    • http://pelurafuru.rus-snow.ru/uploads/2020/01/27/zopuz.pdf
    • http://grandcentralmotel.com/uploads/1/3/0/4/130476066/fodavagerugupesabi.pdf
    • http://cafe-nitro.com/uploads/1/3/0/2/130291783/12206e6402.pdf
    • http://wkapparel.com/uploads/1/3/0/4/130483741/nogirifufa.pdf
    • http://rehphotography.org/uploads/1/3/0/3/130313106/130313106.html#android+vs+ios+market+share+2018

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001104.bin
1da43a5118febad9407175c5687c723897d877a5f1f823bcfb92e53e1f829871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1104 8412 bytes
font_01_sfnt_off0000525e.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x525E 16268 bytes

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