Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8dfe5dcdf3e3b5…

MALICIOUS

PDF

43.5 KB Created: 2020-10-30 03:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d71b556617ae6711f85cfb0dd515bbe SHA-1: b9d9963e6beb582abf395957fa332e5b3aab6091 SHA-256: 7d8dfe5dcdf3e3b545304bae6f048b731adda73bb5c6e0a340a746eef9d5bd16
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful site. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=are+delta+faucets+guaranteed+for+life
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/2525163.pdf
    • https://kisogegexene.weebly.com/uploads/1/3/4/3/134374262/6fc0b27.pdf
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/4083450.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/1524679.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3dd930d1-b2bc-443e-b02a-d74614cf64db/niguvonedumopupegejunokug.pdf
    • https://uploads.strikinglycdn.com/files/301b964d-f54d-4d4f-a64d-93bc4378e495/clarins_manual_auto_lifting_method.pdf
    • https://uploads.strikinglycdn.com/files/4c4d41ca-019a-43be-be52-85f354c64a7a/chat_de_videntes.pdf
    • https://uploads.strikinglycdn.com/files/da03babb-0e44-4e8a-b9e5-a980c94dd565/turkey_brook_park_splash_pad.pdf
    • https://uploads.strikinglycdn.com/files/ddef6453-970f-43f5-84bc-075a0f7548dd/9514637272.pdf
    • https://uploads.strikinglycdn.com/files/cc0ec600-58b2-45ff-aa99-68b9e96f1a6b/36629824590.pdf
    • https://uploads.strikinglycdn.com/files/9c89a144-a47f-4433-8c93-bcc7eb1a23f2/xanuxatupoxinekipazun.pdf
    • https://uploads.strikinglycdn.com/files/8b795efe-ffd3-4788-87de-8aca6b52bd15/fopadaxorag.pdf
    • https://uploads.strikinglycdn.com/files/cb2a6743-906c-4c10-8a9e-47e736d90e29/92659313162.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007265.bin
6efc6d5bb63a43820f03448ebf8ac72539ad16c9c5235e1d79b807d820fb88f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7265 5060 bytes
font_01_sfnt_off000083a4.bin
8c338d1d48d477400433a0424f0d3764109d4266c8c5c9f60bee6cbde37524ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 10500 bytes

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