Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9a9fc17204d6ad…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 17:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 867e081122343156e3ed66e3964ffe37 SHA-1: f7a07d6cd5393c265d69c33fcbd3fef147e1812e SHA-256: dd9a9fc17204d6add1e6daee733c7f5e3c58b3ad1e5e61fdd248b1d95329b3b1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated and appears to be generated content, likely for SEO manipulation or to host a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=past+continuous+tense+exercises+when+while+pdf, which is flagged as a redirector. The presence of numerous links, including those hosted on Shopify, suggests an attempt to distribute malicious content or manipulate search engine results.

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.ru/wix?keyword=past+continuous+tense+exercises+when+while+pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/bollywood_sad_song_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/32371041042.pdf
    • https://cdn.shopify.com/s/files/1/0439/4542/7102/files/32387722157.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/1697287288.pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/59588444743.pdf
    • https://static.usrfiles.com/ugd/0d089b_a362a3b45efb4b5c9c8d471f9bc965ac.pdf
    • https://static.usrfiles.com/ugd/e5a943_5f323466aa1a4445bf80a6ae0d63cc83.pdf
    • https://static.usrfiles.com/ugd/90423f_db2bb459bc3f4dc2b113a59e4da867cd.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_4b54829cda60440a820299b0c11ba64e.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/duwigogogetot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/bupatixuj.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ad9e121e30941b399d137c18de57ba9.pdf
    • https://static.usrfiles.com/ugd/b8c837_00b0f315ce69400b92392478d17f8673.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_off00005ab5.bin
9676dfd26247ca2ad3b5bb18d3ebd97d307b2b501729722a4f6f1525ac6655fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB5 5404 bytes
font_01_sfnt_off00006d1a.bin
d3ef31be6ddb115a3bf99ace101810c26e69f9484da6f523a97d40ea1f3dcd3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1A 10164 bytes

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