Malicious PDF — malware analysis report

Static analysis result for SHA-256 9630bb347cb83289…

MALICIOUS

PDF

46.6 KB Created: 2020-08-19 06:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72f241f23fd8afac8cfe2781bd93c6a2 SHA-1: 9b5c5487cc875a7a2cf241343e416b3bf956e39a SHA-256: 9630bb347cb832892e421ea00c213fa02d081808c860e63a71dfe5fe6a23d1ed
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to a book title and the redirector URL, suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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=endless+night+agatha+christie+pdf+free
    • http://files.trailofhumanity.com/uploads/1/3/1/4/131411688/zunidoses-vekonuxaz-dawalobe.pdf
    • http://files.lexingtonlatinschool.com/uploads/1/3/0/7/130776749/0b57185008.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/aula_internacional_1_nueva_edicion_libro_del_alumno_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/mufegubuwoxinikuxokodub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/vagumejawinogugokowa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/mojodowas.pdf
    • https://cdn.shopify.com/s/files/1/0447/4994/7029/files/arduino_code_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/82899763694.pdf
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/85157815758.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5300/files/community_ecology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/wuwudevibibobinove.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/jerape.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/dopegufedetofowukisum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/diwosama.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/87533126954.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_off000077ca.bin
8c22d51f54ddaf5b1149c91d72d8fe4d7c3441e7b7d73a38d460007f9bd83293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 5376 bytes
font_01_sfnt_off00008a05.bin
7985feb532a15f95cb1bedd85f6bed73fb8376231d184c04dbbaa78f92d661fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 9848 bytes

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