Malicious PDF — malware analysis report

Static analysis result for SHA-256 222e372ab28e9ab5…

MALICIOUS

PDF

59.1 KB Created: 2020-08-29 23:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 541ecc5a7b0450749cb458cbae9bdd58 SHA-1: 8d6cddd2d2188c40294197c24d891a256eaa4ef9 SHA-256: 222e372ab28e9ab5ffd70ef1f788289c44a2ec76a37806613c370e6c8b0bd2a5
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of the primary links, https://ttraff.com/wix?keyword=algoritmo+y+diagrama+de+flujo+ejercicios+resueltos, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL, suggesting the PDF's purpose is to lure users to potentially malicious content through deceptive search result-like links.

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/wix?keyword=algoritmo+y+diagrama+de+flujo+ejercicios+resueltos
    • https://static.usrfiles.com/ugd/b8c837_58416f673d194866acf20d68800139f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a625bdb0bbc4245b356fa1e0d79689b.pdf
    • https://static.usrfiles.com/ugd/77eba6_ab22ad12aa934c5ea5b5cf6b3180b8f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7e4032911c447a1b1c289acb84cc05b.pdf
    • https://static.usrfiles.com/ugd/b8c837_34b50b827e3f437b9d9bbf6ab7b54bb4.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/bomitezi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/pojumi.pdf
    • https://cdn.shopify.com/s/files/1/0464/7308/5078/files/cat_creator_android.pdf
    • https://cdn.shopify.com/s/files/1/0465/1316/0350/files/52090513816.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d867d7014664b87bf22cb521000f3ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_04040f7608d74a0495fb67801fd37b0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b224d8e76dea45cda904ec41700dd946.pdf
    • https://static.usrfiles.com/ugd/b8c837_2510d2264deb4f169ffe51de2ba550b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_047d7581b34d4ac0aea64f87fae868b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_08c399fe49304148b41c4bf101ebb749.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_off000094c6.bin
5cb92e190762db7d5ec327bf57bac30c147f705c2b2e4e36398896acf7ab8344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94C6 5508 bytes
font_01_sfnt_off0000a770.bin
5f9059e784b6d6e5dfe3550ab59bc89552c580ae20b35a941035a94ee23dfcd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA770 17804 bytes

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