Malicious PDF — malware analysis report

Static analysis result for SHA-256 eece836d16dd93d5…

MALICIOUS

PDF

43.6 KB Created: 2020-08-29 20:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c9aba664f8e2234d935162811adeac7 SHA-1: 9de3552d6a7ebc0b277b41d128dc957dabd08bbb SHA-256: eece836d16dd93d556ca278f481d1ce69c505968f11c3ba700db7244479b1837
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.ru/wix?keyword=1996+7.+3+powerstroke+fuel+system+diagram', is designed to lure users into clicking it under the pretext of providing technical information. The file also exhibits characteristics of a link farm, embedding numerous external links, many of which point to 'static.usrfiles.com'. The primary malicious link is the most critical IOC.

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.ru/wix?keyword=1996+7.+3+powerstroke+fuel+system+diagram
    • https://static.usrfiles.com/ugd/b8c837_042007822ad24e519d279f0d3604b673.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2298079133140999817f0eb7840f75a.pdf
    • https://static.usrfiles.com/ugd/7e6083_a91e1d53647143c59f91a3e5761f33d8.pdf
    • https://static.usrfiles.com/ugd/ac72e0_ee76e4f1cfdd4ef8894a9475741c1dd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e178cdb969847e5933a8d0d38cee5e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_195e06c7da894170a91d6081932901e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d64aeb2fd244f58acb219daefbb57bf.pdf
    • https://static.usrfiles.com/ugd/e42ee3_f380af83216748d1995bf61d0a411a76.pdf
    • https://static.usrfiles.com/ugd/286fb8_0dac29a2f737443686cb248deda87f47.pdf
    • https://static.usrfiles.com/ugd/b8c837_80c09b72ba0a440abe4c978e1794a1c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b60954656eb4c149fba766bfe93ab8f.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/editable_paw_patrol_birthday_invitation_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/love_lifted_me_hymn_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/47140292369.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/81792605891.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_off0000629a.bin
9d8f6577867a3e10b3fa8fa001590bb75da725c67e524e5f81192d8645026fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 6160 bytes
font_01_sfnt_off00007797.bin
f470312ed80d9e83d4b7ede9764431b250ad2e22fafa3f2cace049971b17b7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 13232 bytes

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