Malicious PDF — malware analysis report

Static analysis result for SHA-256 330363a045f50bcd…

MALICIOUS

PDF

49.1 KB Created: 2020-08-30 04:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78959ad6b63337ed9a0cdef4617c3082 SHA-1: b7c3fc3877f690c69b82ede27209977778aed65e SHA-256: 330363a045f50bcd3d3e9c7b0fc87a42b98ec9bd68c0446d3941b5a48b3cbea7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/wix?keyword=bodybuilding+diet+plan`. This URL is presented within the document body, disguised as a bodybuilding diet plan. The PDF also contains a large number of external links, many of which point to `static.usrfiles.com`, suggesting a link farm or redirection strategy. The primary malicious URL is the highest priority 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=bodybuilding+diet+plan
    • https://static.usrfiles.com/ugd/cac9e4_9fab6fc84d2a4687b89525a833f81de1.pdf
    • https://static.usrfiles.com/ugd/b8c837_668e81b89e9741bb83929efce7f71966.pdf
    • https://static.usrfiles.com/ugd/b8c837_08b91a96f3c442e09092f9c64505cbca.pdf
    • https://static.usrfiles.com/ugd/b8c837_f71dee7c754c49a1b475d2b705e2bff9.pdf
    • https://static.usrfiles.com/ugd/756799_c5256155c897418496563924b60486ef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/13794762162.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/sqlite_create_database.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/37275024077.pdf
    • https://static.usrfiles.com/ugd/b8c837_a85ef4a6d15b43b6ae8f9c7b617ac121.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dbb0c6315ab470990b15fa186d3b1ef.pdf
    • https://static.usrfiles.com/ugd/48d9a1_3dd773271a4649ce88ee9f0b1f65176d.pdf
    • https://static.usrfiles.com/ugd/63022f_ce2a5531021d43368316f99dde099fea.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/58255967491.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/testimonial_propaganda_definition.pdf
    • https://cdn.shopify.com/s/files/1/0450/2241/2958/files/nowomozesozabox.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_off00007975.bin
e7eaad1b89726c3281c9a1eea00b97e5da5e5cea7c3539a06d1875fc46ceb039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7975 5144 bytes
font_01_sfnt_off00008b0b.bin
19cd370b8f24ee2a5703d669cb12f2e5546315a409545185a14e03d494a5ef01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0B 14144 bytes

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