Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ebe2545ffc9cae0…

MALICIOUS

PDF

40.2 KB Created: 2020-09-06 06:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95925f8cc6958b87e65fa7c1bb7f7fcd SHA-1: 8f44c4180de8af795acb560f106303b55fc4a8fa SHA-256: 4ebe2545ffc9cae083c697cde63d4eec63b80800ac7ed000afe6844261b8ce98
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though garbled, contains text that, combined with the heuristics, suggests a lure related to payment instructions. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

Heuristics 4

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.link/wix?keyword=sweet+shop+designs
    • https://static.usrfiles.com/ugd/f3ecbe_17e4e0e09942425d96130276006d47f8.pdf
    • https://static.usrfiles.com/ugd/9ea91e_f24aee8e067b44ed979269729e6861aa.pdf
    • https://static.usrfiles.com/ugd/5af86b_15a5e83b358942599e6613fab3ff3d61.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/87628468526.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/69451255661.pdf
    • https://static.usrfiles.com/ugd/3f80ec_ddb7510d3bfb46ecadf120524f8833f5.pdf
    • https://static.usrfiles.com/ugd/8c5bc8_c458a8e76897479dab39a5da6399e959.pdf
    • https://static.usrfiles.com/ugd/fb41f9_d46568a1d0014b9bb829c49f87a086cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9279de599f68444c995f795baf3c8916.pdf
    • https://static.usrfiles.com/ugd/a72fa8_7eac00cdea2e4217935009309683cb31.pdf
    • https://static.usrfiles.com/ugd/370ea2_aa06356c8f7a4c65878be1de336eff81.pdf
    • https://static.usrfiles.com/ugd/538d67_d2a72bc2bb91445cbbe929d7c304c6fb.pdf
    • https://static.usrfiles.com/ugd/bcfc12_1c40f41477d3424e81eb79b1c92d6551.pdf
    • https://static.usrfiles.com/ugd/225520_62cf9491223048ff932924dd92707373.pdf
    • https://static.usrfiles.com/ugd/122077_2c930110315f497d93b5976fafbfc61d.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_off00005f32.bin
83210d9f475eb8d955cb0e058ecb956f0147b2582b3fd769bf4fbe273b470216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 5080 bytes
font_01_sfnt_off00007091.bin
c0c8dcc7d60da63ad707ed1d1f72422e1e4a1f7be4232e958953ef59470ac56a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 10572 bytes

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