Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ff34c8b77dfd31…

MALICIOUS

PDF

43.2 KB Created: 2020-08-29 10:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db62de8c9348d5c906a6e86459fdae5d SHA-1: fbb1c2c71be06d90b650e9cb8c75f60d7c43f1fa SHA-256: 12ff34c8b77dfd312ffd5f21bb5f8ef71931f467105655283ea835ad83c5c648
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to a redirector service known to host malicious content. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect the user to harmful infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.me/wix?keyword=buku+musik+gitar+pdf, which is flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.me/wix?keyword=buku+musik+gitar+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_00b3d5b5938c44d1b04ac96dc5199399.pdf
    • https://static.usrfiles.com/ugd/b8c837_46097ce2206045ce97267481e2a31680.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6dc46405b074502859cef609ce0d915.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8622664ef314cee864ad0e601194f1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b85067cdeb548399a006cf4caf3c6a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c007166d0c1f478d9e6c4c4778f2723f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2144100e9be34a09ba9a82ea531e3fca.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5cb405eec374da292893a431cdc0498.pdf
    • https://static.usrfiles.com/ugd/b8c837_a292157288c34cb6a8fde7ba316f5abb.pdf
    • https://static.usrfiles.com/ugd/b8c837_82d58ea8d7b746d8b83657b1ec4f3a29.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7d436a990e44393aaac78d2bab903c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd1238f0b46d4037a71f11897567eaff.pdf
    • https://static.usrfiles.com/ugd/b8c837_257d23e1e02542b4b4d88e6a581935f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e4e2a1d621446939847d2da4ef603dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bca322c6d504ac6905a2c2d4d0bb7d4.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_off00006a70.bin
b5046544ad5df5d994a436c77b56c859d1b55bea529ddef317f4559bf6303c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A70 5440 bytes
font_01_sfnt_off00007cdf.bin
4a920b260153b12397f54844c4e5db117f64e578fccf760b85d8fc5a156488ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDF 10316 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.