Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3e43c7c504aa7e…

MALICIOUS

PDF

145.4 KB Created: 2020-08-29 08:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 685e5b40b899f23cf0d7c805c44c7f3a SHA-1: b36280c8f39f9422455b6e9418029f5c354022a2 SHA-256: bc3e43c7c504aa7ecfb68cc0fd6eacee734b93383df28b8d3236fe311a9b30bb
160 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a 'Windows 7 loader'. The document also contains a large number of embedded links to other PDFs hosted on Shopify, suggesting a link farm for SEO poisoning. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway security.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=windows+7+loader+oem+1.5
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/11521716942.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/kemimodizenit.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/91448920498.pdf
    • https://static.usrfiles.com/ugd/b8c837_64868b7e3afa4005ab0bfa9053173533.pdf
    • https://static.usrfiles.com/ugd/b8c837_8802e6d6dfc24d6abd5ed5a757618d64.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb243ba64c664cde867e4be476f46504.pdf
    • https://static.usrfiles.com/ugd/b8c837_71baf34b07de4a609da323efc26e6da5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c75d12bd18d45daaf7b6b814430cbda.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35a52cb868b4ccfbcf705065ad8575a.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/wevijij.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/rikokiwowasagegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/kexoronagutojas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0343/6446/files/2967185212.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c7a4.bin
f9ae15dc7890912bfc05c364669c1cfb71e965538738d488183533af5e9d4a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7A4 11340 bytes
font_01_sfnt_off0001ec88.bin
3f0c69aec4061a9263e1f9bd5e7b0a4c274956d9d7070fe5b898b0ec80909824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC88 5364 bytes
font_02_sfnt_off0001fed3.bin
9a886f8fc9718b24a597aaf2d05fe2761ceaa5b7ed9e5fb1f100c41bbcd19005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FED3 10156 bytes
font_03_sfnt_off000221be.bin
f30dee97049be9486f88286cd27f440b23a478558c7e67267c2f80a8fc0e6b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x221BE 16232 bytes

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