Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3dad5a9c8d415ce…

MALICIOUS

PDF

68.4 KB Created: 2020-08-29 09:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c6e36d3be07640f99046b145424b21a SHA-1: 8dc93b0eea1f4bc3ab79ead5c4e39fd7ffa976c5 SHA-256: e3dad5a9c8d415cefbc62612abfb99b2de4d4a0c97e22d24552ce9983b9a6340
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=quien+fue+gonzalo+guerrero', which is flagged as a malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.ru/wix?keyword=quien+fue+gonzalo+guerrero
    • https://static.usrfiles.com/ugd/b8c837_0ef0b7b5cfa94282a8fa342ea28f6974.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec6dc4abfed24e0485d191fad560d80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3912266a6694ec7a4038ccb1f1778ca.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/rofegibitilexutixaxib.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/47618937191.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/11138148524.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0e5f779e2c14160ace742a8223cfc19.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc7be2a4f37d4ee185b095c27b16b510.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c41b12f55664c5b90d4efb899e7a3a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_13f261257c5043a58472f0bb93139fd5.pdf
    • https://cdn.shopify.com/s/files/1/0450/4174/6078/files/abortus_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/jumagabazokipekuwatusi.pdf
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/interior_design_brochure_psd_templates.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_off0000cf1d.bin
60e4cc29f9f9a47965afc817d0552b3ee91df6f48832434fed306497b27375cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1D 4868 bytes
font_01_sfnt_off0000dfcc.bin
b2a1e0ed7cd10d7895638c0fbe89432ae2c4888291850b00879dc62cacd3d6aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 11416 bytes