Malicious PDF — malware analysis report

Static analysis result for SHA-256 976fccb01f26dd41…

MALICIOUS

PDF

54.2 KB Created: 2020-08-29 14:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f856c7765ed480d2a8c07832c0036d9 SHA-1: 3c0e94a6a92eb2b69598bdf2f71fc1dab148cded SHA-256: 976fccb01f26dd414341e2ff3d14963ff808cd3bb517ab6a49420f02c2423953
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded PDF links, many pointing to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=wolfenstein+new+order+save+location
    • https://static.usrfiles.com/ugd/dd4472_8bacfd7ceba74396a777dd1e72ba3fe3.pdf
    • https://static.usrfiles.com/ugd/dad90e_33e5dd6b2fec453e9d7fd4de6cdd0276.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_d9173ad3f31c41c4a505e6ab3af79544.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c5d16abe8724c6e8d96a30362a1b6ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_c808b6b09c1e45648afa93b61cb4a8ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_da0e981594ba4776892747714e25d664.pdf
    • https://static.usrfiles.com/ugd/b8c837_79eba934a7234347be9d08136de9d753.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ff12834845d49d0ba5032f32de91a76.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/14517259038.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/52621676681.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0439/files/asco_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2092/files/fibokaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2187/6900/files/6290763491.pdf
    • https://static.usrfiles.com/ugd/b8c837_36333086043b4e07be6b7cde5fc459aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_13949a42db8247f8b44fcf2be7f40b70.pdf
    • https://static.usrfiles.com/ugd/b8c837_32fe25f75ec94347bb927212096f365a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e26aba2fe3248e48108a57d43fa3a8c.pdf
    • https://static.usrfiles.com/ugd/b91566_3401996ac31540d6a6d0509c90aeeba7.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_off00008002.bin
b8a536803a6fe0452ed47a0d48b0eb2118289fce9306b674bd016c6f19acd9a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 5180 bytes
font_01_sfnt_off000091cc.bin
841f4905119a2eb2b9ffabb9dbd2af9e46490a3518e020153b1e39d41c692f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x91CC 10568 bytes
font_02_sfnt_off0000b617.bin
c8cad0fcbf711734ba90d1bf0f33d5774ae0d43a5fc07b95f2d0d23150af1919
pdf-font-stream PDF embedded font (sfnt) at offset 0xB617 16088 bytes