Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9dd5dcb364aeba9…

MALICIOUS

PDF

35.2 KB Created: 2020-08-18 16:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ddbae3f169a72265d41a072d0c1fea2 SHA-1: 2079c66a5f8d15281b8923b42535b4aead13153e SHA-256: f9dd5dcb364aeba90428cb07f00711ce0b870c28fe5a4d89ec36fb963557e48d
120 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 of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to lure users into clicking on malicious or unwanted content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=physical+science+textbook+grade+10.

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=physical+science+textbook+grade+10
    • http://wexefuse.seas-marketing.com/uploads/1/3/1/3/131379803/wuripapotovodi-petiva-pusudopoma.pdf
    • http://files.ethosmatters.com/uploads/1/3/1/6/131606367/9810421.pdf
    • http://files.eversweetny.com/uploads/1/3/1/4/131452836/3821519.pdf
    • http://nukukure.forzathletics.com/uploads/1/3/1/3/131378850/gudobax-fibabubutew-sepiwupuse-nemaxan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/8318983330.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/bilipu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/norodevadojipabujexup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/festival_cervantino_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/classification_of_feedback_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/48979688049.pdf
    • https://cdn.shopify.com/s/files/1/0428/4920/6439/files/rivifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/nizilosepeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/cast_of_magic_city.pdf
    • https://cdn.shopify.com/s/files/1/0434/0187/1512/files/colloquial_arabic_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5597/0454/files/28011235198.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/momiluxivuginorov.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_off00004999.bin
9921e42798de70f134dfbd8a32ccc6381242aa7447873a54f67974610cef8dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4999 5772 bytes
font_01_sfnt_off00005d2e.bin
dd8a8edfc26fe466b5e460823fbf26e9046ab8ca801c35693ef244bc2a93f84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2E 10456 bytes

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