Malicious PDF — malware analysis report

Static analysis result for SHA-256 024fab1a38c6f9b7…

MALICIOUS

PDF

54.0 KB Created: 2020-09-05 20:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eb3752b9202025491aa7ad0148d9cc9 SHA-1: 1880179cae93b75123562524261b2477abb40e92 SHA-256: 024fab1a38c6f9b7594b54bdc4c4aa8c65b9a00da893bc94d1c962f75333f7dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting an intent to trick users into clicking it. The presence of numerous other links to PDF files, some of which are benign, indicates a link farm strategy to potentially improve search engine ranking or distribute malicious links.

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.link/wix?keyword=swimlane+flowchart+excel+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f09a9d_fcc91c0f777e41c1898632f8d7a0b2ca.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_947c6789526b424ebff7d071a5267940.pdf
    • https://static.usrfiles.com/ugd/d4da64_c9f422d8c6844f658b0e330d4ac061ce.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/faxodukuzobagerunuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/pilafan.pdf
    • https://cdn.shopify.com/s/files/1/0435/8543/7853/files/kanuguliga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/wuxewomezilizoku.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/romewigoxegokidaroweze.pdf
    • https://static.usrfiles.com/ugd/b8c837_acdbb6ff422f4e5e854f4982dd587dd7.pdf
    • https://static.usrfiles.com/ugd/79e5df_4178d1f39919479d804139b67f3623a9.pdf
    • https://static.usrfiles.com/ugd/b4a829_c13907c66bd04dbc8528ef54695835d4.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006103.bin
ed9a60b1dbf898d88a932457cd393fbc0dfe1bdec2f01db1a8becddf13e42b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5340 bytes
font_01_sfnt_off00007315.bin
8fce9a1292c8fcde9b389e1ce1c813430e6384d6ce097fafd4ef08bbff128df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7315 4508 bytes
font_02_sfnt_off00008424.bin
e3d3b101741ba800e45a50deba7593d9cb8b337676a031e19d847f7764f44468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8424 15444 bytes
font_03_sfnt_off0000b3c2.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C2 16144 bytes

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