Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe77455de4401dde…

MALICIOUS

PDF

43.1 KB Created: 2020-09-01 13:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac1afaa99ea1a57dcd35360262c3e18c SHA-1: 1345c1545f3db0b325d8efa901562d768467569b SHA-256: fe77455de4401dde2f2dc2703ee46d4bace2c4c7d7bc40776886746539e55187
160 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is a known malicious infrastructure. It also features a link farm of other PDFs hosted on 'static.usrfiles.com'. The document's content and structure suggest it's designed to trick users into clicking the malicious link, possibly by disguising it as a download for 'Atmel avr studio 6 free'. The presence of a password archive lure heuristic further indicates an attempt to obscure malicious content.

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/pify?keyword=atmel+avr+studio+6+free
    • https://static.usrfiles.com/ugd/544c7e_e20d77d748b74c24aa53bcbd0226ddef.pdf
    • https://static.usrfiles.com/ugd/69b86f_780434d793eb45fd9de4ccd34918555f.pdf
    • https://static.usrfiles.com/ugd/a58b01_5e28ce1ee2774e7dab635649dbd21928.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf71010f633e4f8f9dcf5413e4d7993d.pdf
    • https://static.usrfiles.com/ugd/39cb9d_398ff67df3e943bcbdb7038dab98b41f.pdf
    • https://static.usrfiles.com/ugd/d216cb_4cfbe11f5a1d4f489d114c9fc5c59153.pdf
    • https://static.usrfiles.com/ugd/b8c837_556f5ec37c0d4b2c80e03d32bba77fd4.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_e8f372f4c6214947906e6ae6e94179c3.pdf
    • https://static.usrfiles.com/ugd/e23fbb_8e8526e74d4543a5ad6a7d34fda80b30.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa3fa73308eb48418ac39d3571712b87.pdf
    • https://static.usrfiles.com/ugd/b8c837_c68e448a9dff4b0caa2b20c150e57978.pdf
    • https://static.usrfiles.com/ugd/764aaa_53565a78000c4ce588a25c7f97ebedc0.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_e55b43a8a30c4eefb40b54484384928c.pdf
    • https://static.usrfiles.com/ugd/5bb01c_2197487db0954cfea22887c19709988c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000547a.bin
75dcfbfc0aac4db265a15324c9ce2b3eeb9bcb078807e880dabae11f4e75a317
pdf-font-stream PDF embedded font (sfnt) at offset 0x547A 5256 bytes
font_01_sfnt_off0000664d.bin
4a1bfa1fb03a62884684b05de5714d3f412681e0f50511671616d46d0b5be743
pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 10192 bytes
font_02_sfnt_off0000896d.bin
ca021ef10f9420afcee8b3e7a84d9f9bc603417c4fe057d650af5b84ffb31fa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x896D 16100 bytes