Malicious PDF — malware analysis report

Static analysis result for SHA-256 af54121b3d1b74ff…

MALICIOUS

PDF

44.0 KB Created: 2020-08-14 12:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a19f99239ec915857ca71a7d8ead901 SHA-1: 835af3a76fc1e21d5c504c1180c0478d87a242e0 SHA-256: af54121b3d1b74ff4384511ff6a42cea5c0ada6d5ae406362566fb726d3509fd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are to Shopify-hosted PDFs, likely for SEO manipulation to improve search engine ranking for the malicious content. No scripts were extracted, and the document body's content is largely unreadable binary data, making it difficult to determine the exact nature of the payload beyond the initial redirection.

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.com/wb?keyword=multiplicacion%20de%20radicales%20ejercicios%20resueltos%20pdf
    • http://files.thedanceforumsouth.com/uploads/1/3/2/3/132303009/jugemotusoju-rofasebipudav-pikumit.pdf
    • http://files.rachellelabellesbooks.com/uploads/1/3/1/8/131857304/17094d495744.pdf
    • http://files.coolforcatscafe.co.uk/uploads/1/3/1/4/131407088/4032806.pdf
    • http://files.johnirwinsonlinebusiness.com/uploads/1/3/1/4/131437669/0215b4285.pdf
    • http://files.sabasphotography.com/uploads/1/3/0/8/130873794/xuritudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/korea_customs_declaration_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/67598846339.pdf
    • https://cdn.shopify.com/s/files/1/0428/0804/9830/files/39072119184.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/10301181791.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/18187595919.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8823/files/fipejojulebibur.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/john_deere_317.pdf
    • https://cdn.shopify.com/s/files/1/0437/4780/3287/files/sabiston_textbook_of_cardiac_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/ielts_academic_reading_practice_test_2_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3377/9611/files/maxozetesuzedololuvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/bonowapalowomibadeboza.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/anthropology_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/xatoviboxapikezefugepozow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d67.bin
47d2eb908e80e6c6486605065f28e720f4de1ee18f7d67e24718749ac2fffb8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 5112 bytes
font_01_sfnt_off00006ed2.bin
12942396b6454796f5ae59ddea2539164514f92325eb185c8e9b75915161d813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED2 10908 bytes
font_02_sfnt_off0000923d.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923D 4324 bytes

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