Malicious PDF — malware analysis report

Static analysis result for SHA-256 972205379ad8a847…

MALICIOUS

PDF

42.4 KB Created: 2020-08-15 20:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: add155544a82e4ec18f8338dc4eed6c4 SHA-1: 8fb6f9d30e65f59fc935c7a773c7e5dfe5b1a017 SHA-256: 972205379ad8a847ff3790a796c8a12b9430e9cca7bb96f7fab06416a3c16b65
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a redirector service at ttraff.com. This indicates a link farm or SEO poisoning attack designed to drive traffic to malicious sites. The ML classifier also strongly flagged this document as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous malicious links is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.com/pify?keyword=bluetooth+keyboard+android+tablet
    • http://files.esydave.com/uploads/1/3/0/8/130874495/9127119.pdf
    • http://vivas.rosabransonandtheworlingtonmovement.com/uploads/1/3/0/8/130814328/9823276.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/akfi_kabaddi_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/speer_reloading_manual_13.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/c_two_dimensional_array.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/gokibemepuga.pdf
    • https://cdn.shopify.com/s/files/1/0440/5270/9526/files/lititz_pa_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/morunitigikiwijep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/pdf_splitter_free_download_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/samotazozenelidikeze.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006919.bin
5d748aaa50767d8f22e928dc3880e1a100bb9a29b299cb2acc486514bf0c06fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6919 5092 bytes
font_01_sfnt_off00007a68.bin
1114a69249b7e8b6de71a6384a5d25bdf4dc09493f63cef0e11811725440dc92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A68 10116 bytes

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