Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b0ebba07dc700d…

MALICIOUS

PDF

33.1 KB Created: 2020-08-31 03:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c5ead8df8e2f9da12ae21031b2f6e6c SHA-1: 5a0c61e5e4a24c40491f1e5244fc98d12607e02b SHA-256: 41b0ebba07dc700d5b6568b6de27b0eff69627ae441bcad86ae48324ccefef55
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=barbie+dreamhouse+adventures+full+ep', is designed to lure users to malicious infrastructure. The document also contains a large number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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/wix?keyword=barbie+dreamhouse+adventures+full+ep
    • https://static.usrfiles.com/ugd/b8c837_6814c69d96b94604becd8f9c5dc5b34e.pdf
    • https://static.usrfiles.com/ugd/696b8a_a08b2cc4f44548ff83862390d51ee4d2.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_d3120dc766754517abd68e3a62130c12.pdf
    • https://static.usrfiles.com/ugd/64f9d2_c92f6c6e2d8a4435ae5a7bf33cbfde33.pdf
    • https://static.usrfiles.com/ugd/c345b0_d67754a939304bc68b4a1e9069d7bfdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6490/8181/files/joxexibejapusakub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/26915637858.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/geoffrey_chaucer_the_knight_s_tale.pdf
    • https://cdn.shopify.com/s/files/1/0440/0336/0926/files/58752854761.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/nixidodujarevegurira.pdf
    • https://static.usrfiles.com/ugd/dad90e_3eeed47f9cb7439795d293d584c345d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e43635ec5705449cb025bf6588570ddf.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/the_chi-_lites_oh_girl.pdf
    • https://cdn.shopify.com/s/files/1/0435/7819/6129/files/android_studio_installation_steps_in_windows_7.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_off0000444e.bin
beed5577f24dbeb8bdce8c21d4ec56a9c08f1aa62499c8c030b1a0177e8576eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x444E 5528 bytes
font_01_sfnt_off000056f6.bin
9e70af92ad3303cb84a182d04ddca3d45ab33bdcb09c79984d7dcac96e87c073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F6 9508 bytes

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