Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a29284ac1e1fe2…

MALICIOUS

PDF

40.9 KB Created: 2020-09-08 11:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31be61e8ccf30c2ecda1f81aeab96fbc SHA-1: 94ad114031dd3a84463bf772a22a1ae2146c6471 SHA-256: 60a29284ac1e1fe2a493783f3a322cf0b8a5358ff1c648c0fcac772ed430a97c
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm, and one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=abbyy+finereader+14++trial', suggesting a lure to download or activate software. The presence of a 'download button' heuristic further supports this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=abbyy+finereader+14++trial
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/bf57b5_d89e812385c24f5abca19470351b8445.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_7215a748271448c8a96ae41a5ab28c3c.pdf
    • https://static.usrfiles.com/ugd/1e4819_1ba9a1874b3b4f9f9ddeda30d8c8f8a3.pdf
    • https://static.usrfiles.com/ugd/73c254_4be7fe67b6c54c79b4164d5d706956eb.pdf
    • https://static.usrfiles.com/ugd/34ec99_7ef465dcf762475381ca763d67b7875f.pdf
    • https://static.usrfiles.com/ugd/65b209_7a289791946247e3bd009ba0132cbe0c.pdf
    • https://static.usrfiles.com/ugd/6cfc61_4d07ed7cdb934cf5ba0116bdff9fcd7b.pdf
    • https://static.usrfiles.com/ugd/a1fb72_12fde4bd31ec4a728f29c28561fa563a.pdf
    • https://static.usrfiles.com/ugd/3bcfef_c3d42118addd4da8aa4b9237706060cf.pdf
    • https://static.usrfiles.com/ugd/eb4c03_bfabd82d3cb04a0e9ffadb8ef70fb062.pdf
    • https://static.usrfiles.com/ugd/145364_70ee2919cf724046951ba55bc4e2ef50.pdf
    • https://static.usrfiles.com/ugd/defcb2_64e005f282a54543859cbd32b5679dff.pdf
    • https://static.usrfiles.com/ugd/8c2e83_242cff8e9c084dc8afbbd0e01f9e5aff.pdf
    • https://static.usrfiles.com/ugd/b28ae2_a8f216f1a4cd461fa5a21cf8f6dce7d4.pdf
    • https://static.usrfiles.com/ugd/7a359d_0f76fdb7cb724f1c88d859ab752e313d.pdf
    • https://static.usrfiles.com/ugd/4c7633_17b8893de24b4aa1a9d177c93ef1fadc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d5.bin
41fc62513090f879229e53afcc7be973040c0d47034433b00272f1070a801b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 5092 bytes
font_01_sfnt_off00007346.bin
8bd726544b9a66c5c5feee05f43b09c1d76c9a2b0993f95b9b89f854bd2c0d7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 10516 bytes

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