Malicious PDF — malware analysis report

Static analysis result for SHA-256 518d5525ee69f8e0…

MALICIOUS

PDF

47.1 KB Created: 2020-08-29 16:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae7bd9293384b519f4fb37e6428e259f SHA-1: 0f07fbd9407117d958aee93254f9d0e8fcd04217 SHA-256: 518d5525ee69f8e0792b36644b2f71325f6d17245e08b7ea8c9564dd0e94b322
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a math exercise list. The link points to ttraff.ru, which is known for malicious redirection. The document body, though heavily corrupted, contains fragments of the intended lure and the malicious URL. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning and traffic redirection.

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.ru/wix?keyword=lista+de+exercicios+de+matematica+semelhan%25C3%25A7a+de+triangulos
    • https://static.usrfiles.com/ugd/b8c837_179209e83ce24ee09f428c79ba82157d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3de774401a19459cab34877a8135017a.pdf
    • https://static.usrfiles.com/ugd/b8c837_683c0a4f93294e2981165eedbd0cb3e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd761afde9dc46d5aa79391bae547ccc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6d1a1a281cd4e11a0b0ea853dca1c83.pdf
    • https://static.usrfiles.com/ugd/3b7182_bbd9322bc9bf4bbab6cf9ac35e49daa3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab96afde982e44ff8247b25864394a6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a5f503f28c84634846b6601de0d3aa9.pdf
    • https://static.usrfiles.com/ugd/ace02d_f19ec547a0514b5ea446893975c3983b.pdf
    • https://static.usrfiles.com/ugd/b8c837_861183074ec84b019bfb727e8f6b6c40.pdf
    • https://static.usrfiles.com/ugd/b8c837_423f1dee98b64e0db23e64b60ffe3dff.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/printable_inch_ruler_actual_size.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/96766218622.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000732d.bin
1a099a5405b700e1f04cf6740aa64819665514bfb3ca8c57352b3bd127420d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732D 5544 bytes
font_01_sfnt_off00008593.bin
d9da8ec88f514b08d77502138c4c5e2d8a58ae9ffb16ccb3a2e6e23144da6fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8593 12720 bytes

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