Malicious PDF — malware analysis report

Static analysis result for SHA-256 859b4f3f75c67a24…

MALICIOUS

PDF

39.2 KB Created: 2020-08-18 22:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff74bfec7f07b66cdee0290b832edc9d SHA-1: cf5397d099120fa821dbf6b608969522634b1e44 SHA-256: 859b4f3f75c67a24557ed9fc873a5698397a30211ff2b7dbaa602419db167f11
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, including one that redirects to malicious infrastructure. The document body text, though heavily obfuscated, contains the string 'Ba pass movie free utorrent' and the malicious URL 'https://ttraff.cc/pify?keyword=ba+pass+movie+free++utorrent', suggesting a lure for pirated content. The presence of numerous 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=ba+pass+movie+free++utorrent
    • http://files.arielcao.com/uploads/1/3/0/8/130814769/keniwalidebuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/45290289558.pdf
    • https://cdn.shopify.com/s/files/1/0432/1594/5890/files/harlequins_40k.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/sfinae_template_member_function.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/mick_goodrick.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/29911339194.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/93670143157.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/spring_framework_basics.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/30058556278.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/skype_download_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/aboriginal_dreamtime_stories.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_off00005b60.bin
4baebb9410b7f1862fb6f96f1f1799298ce74e935c279ef42f6448a2914fc9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B60 5124 bytes
font_01_sfnt_off00006cbc.bin
5071caa31f0132adb1a109810c6752ac393b78adc2eb057af49a98c80eb84637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBC 10544 bytes

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