Malicious PDF — malware analysis report

Static analysis result for SHA-256 764c20a3dbfe9904…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 08:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4797293f77bf61e3b8249baa5a7c9484 SHA-1: 42bf9ba2b6f3164833156cede2dd0275299107e6 SHA-256: 764c20a3dbfe99043e0607f84f88678ab6ad1ba863347e7f253e7d338f9e1e68
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=sort+tabs+in+google+sheets', suggesting a lure to a malicious site. The presence of many external PDF links indicates a link farm, likely for SEO manipulation or to host further 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.ru/wix?keyword=sort+tabs+in+google+sheets
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_bbd1b390e60e4e74af14b6be7255507b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c69bdd5ea6641f28ed114ab42664ee6.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_7cdefc4632874f809455c88270a932ab.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_dba47de9d3734b0cb13163156ac0fda6.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_a24dfa5285fe4ba4b289010f881a730b.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7607/files/active_and_passive_voice_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0465/0870/3894/files/3392390553.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/76200526061.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4369/files/14991450414.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/29412022581.pdf
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/kusima.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/madurereba.pdf
    • https://cdn.shopify.com/s/files/1/0429/4380/7654/files/cartographic_generalization.pdf
    • https://cdn.shopify.com/s/files/1/0435/2914/2426/files/tawagalaxanap.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/15101802428.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/xewukuweko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46605756913.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/86743809619.pdf
    • https://cdn.shopify.com/s/files/1/0467/5934/6339/files/55013704115.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_off0000634e.bin
2590b477a860038c6defdc0721f167f1cfaef67fc8a7a879119ff406878f08c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 5188 bytes
font_01_sfnt_off000074e6.bin
72b9eb84ee7f05245db6bee4e50d7007b0121853fde15095e1f62230730b4470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 10120 bytes

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