Malicious PDF — malware analysis report

Static analysis result for SHA-256 066d3dd14c2ffcb7…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 22:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c3256f44dcba5043fe2f2865c78f22 SHA-1: d8b3e3d14ea8a228493d024f9116e7d8beea3e14 SHA-256: 066d3dd14c2ffcb751f627f56a5548f007edf59369991a7158848efc71f92248
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link to 'ttraff.com' and a large number of external PDF links, suggesting a link farm or redirection scheme. The presence of a 'download button' lure and a 'password-protected archive' lure indicates an attempt to trick the user into downloading and decrypting a payload. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=buck+boost+converter+devresi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_11f7ecd756004282906389a3974d8e0e.pdf
    • https://static.usrfiles.com/ugd/4bb894_a2252a0b08484a0c87bbda99a4e1e593.pdf
    • https://static.usrfiles.com/ugd/b8c837_73a80f57492649dd8f59a51421ebdead.pdf
    • https://static.usrfiles.com/ugd/ad2ade_0cc160aa4f714997a1deaee8a39a3a3b.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_1bca23a521b24af292050bccde8dfd1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dddf39a16244152941c1945d3893c36.pdf
    • https://static.usrfiles.com/ugd/b8c837_34660902ac7545cfbb8a3f9c8db5ca92.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ec5582f6daa44069867a827a3021dab.pdf
    • https://static.usrfiles.com/ugd/f14cf6_9d1ea0d567da49b1ae0acf05d824d055.pdf
    • https://static.usrfiles.com/ugd/10a4aa_486ac14edf27436797efb566ecbbcaf6.pdf
    • https://static.usrfiles.com/ugd/5ad03d_b99deaad2e8047f89ae1f8c2648c33af.pdf
    • https://static.usrfiles.com/ugd/0c268c_51bfbe6253ff4f7f88d1d5310d371803.pdf
    • https://static.usrfiles.com/ugd/67e251_79ea56cafda642339e35ac6c76b24637.pdf
    • https://static.usrfiles.com/ugd/b8c837_9947050d62384407bd39a6aeef7e5bc2.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f8.bin
8b7e385f180eae07f96629f0bc753187d34d0aef157e09631c0faba1c15b2fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 5004 bytes
font_01_sfnt_off0000730b.bin
633c91048045a83db7a1fc56ff8755f1d705a53a02bf4d1b76257810fb3a628f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730B 10296 bytes

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