Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6ec0d77fe23f86…

MALICIOUS

PDF

35.0 KB Created: 2020-08-22 15:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84793c960f2d83b21305bc88c9ce8543 SHA-1: 0cb9ff535282dbf5168714177a3d78c1cf95cdf3 SHA-256: 2b6ec0d77fe23f86ac8ab596cfa5af3a7a5240210567986158dd0a37f8b6bf98
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The embedded URL leads to `https://ttraff.cc/pify?keyword=math+in+the+modern+world+syllabus+pdf`, which is likely intended to trick users into downloading further malware or being redirected to phishing sites. The document body text, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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.cc/pify?keyword=math+in+the+modern+world+syllabus+pdf
    • http://nozafekak.ethsjapanese.org/uploads/1/3/1/4/131454065/5091677.pdf
    • http://files.wb2129.com/uploads/1/3/0/9/130969742/binakevowap.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/misuluwezana.pdf
    • https://cdn.shopify.com/s/files/1/0462/3056/9109/files/baseball_score_sheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/35104370585.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/nozolakuvezov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/mavazirubojenex.pdf
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/93340271338.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/sawepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/56587637869.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/pibajemikoguxida.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_off00004aa6.bin
269ceb9c598f854c50fd4b9aee2d31fa76274e694763ed4de721a9cfce61fdcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA6 5620 bytes
font_01_sfnt_off00005dab.bin
2b10996d8786176c36f4d8b3d9fa5a56d745cad25fe68e3a1cef61604586a8e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAB 9952 bytes

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