Malicious PDF — malware analysis report

Static analysis result for SHA-256 0817a8906a83ff3a…

MALICIOUS

PDF

105.9 KB Created: 2020-09-17 11:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66856592730baf6029a9ffcfbb03a5f4 SHA-1: 5c2e4ae6d8daa38f335bd9ffc73c74a1c5b1f542 SHA-256: 0817a8906a83ff3a68395ba24cd63b168c45811c67d0d0cc9bc4cabbc4d0de14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=modernist+cuisine+bread+pdf+download', is designed to redirect users to potentially harmful content. The presence of numerous other PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=modernist+cuisine+bread+pdf+download
    • http://pokemowo.pslcrazyquilters.org/uploads/1/3/0/7/130739090/d71223.pdf
    • http://fitixi.victoryhrc.org/uploads/1/3/0/9/130969723/5d9fcdac35.pdf
    • http://kutobim.blakesburgchurch.org/uploads/1/3/1/6/131637131/zaxojugopebi.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5cc8ca5f-b014-45e9-a58a-fe4e9ad22fe0.filesusr.com/ugd/197ed4_b7d53d0523224a378840fe7a4d372243.pdf?index=true
    • https://c521ed7c-34c7-4c56-b7c3-45f7ef4f239f.filesusr.com/ugd/0251f0_a419b8136e6f498e877eb109c37cdbad.pdf?index=true
    • https://c100d533-3c31-468c-b68b-be1baf84d3c8.filesusr.com/ugd/ab5adf_fbbe675ebcdf4237b1bec2ada7cf1f2f.pdf?index=true
    • https://b420ad79-6bcb-4954-918d-0e648c403a3d.filesusr.com/ugd/808cd0_3e9d5d61c78741b0b5469fc9c20564d8.pdf?index=true
    • https://70b9e41d-488f-4400-a3bf-11db937f98ea.filesusr.com/ugd/e948c1_f43107c8d75e49e7af66396458daa116.pdf?index=true
    • https://119acdc1-4dcd-44fd-b4f9-079f55773b88.filesusr.com/ugd/a2e20a_44df0dc27b654d98a97ec97f9b411fed.pdf?index=true
    • https://e44549bd-12fd-4b7c-b908-53eec9a31cd0.filesusr.com/ugd/04e6f9_b65cc6f2903445bc8e18681965beaad1.pdf?index=true
    • https://92051ff4-2226-4154-a5a5-2b7307c8521d.filesusr.com/ugd/229b11_24684a03978845c489756dbf674d81be.pdf?index=true
    • https://928253cd-605d-4798-8235-3bc3c8765705.filesusr.com/ugd/7b00a0_024e1882c28543999e35cd0aa8ed2d7c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/96027865120.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/kokitugifukol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014cab.bin
dcafc6193900557fbd52e1e98f9067de3c4b215078778c9cc4c41c9251efaa5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAB 1656 bytes
font_01_sfnt_off000154ea.bin
b3b58a42ca8e038f4872b6b80badfcc51eeee6c35dc9234194da129233882a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154EA 5388 bytes
font_02_sfnt_off00016765.bin
c5993d84455cd49569ca4748411d43d7e27605753534cbe67ba4b381ffcf9412		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16765 16408 bytes

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