Malicious PDF — malware analysis report

Static analysis result for SHA-256 8017d20ec8d16756…

MALICIOUS

PDF

51.0 KB Created: 2020-08-30 14:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c01848979e05223a6193eabf9d0ad9a0 SHA-1: 611f9435083478fe1128b3dd25e97166b19fd289 SHA-256: 8017d20ec8d16756eca4d4fc1d5c401fe4e22601d7711b92f1c141752031e159
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.ru, disguised as a search result for 'la méditation pour les nuls pdf'. The document body, though heavily obfuscated, also contains this URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. The presence of numerous external 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.ru/wix?keyword=la+m%25C3%25A9ditation+pour+les+nuls+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/92463025291.pdf
    • https://cdn.shopify.com/s/files/1/0431/2586/6662/files/povemepovorononu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/nuwimosevexejulajipawujik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/28356686566.pdf
    • https://static.usrfiles.com/ugd/c345b0_06ceef4ab19b46d89b2812994005c7c9.pdf
    • https://static.usrfiles.com/ugd/353d00_6f29afeff5f447fc9bd65d0cddb69a5e.pdf
    • https://static.usrfiles.com/ugd/5899d5_fb26feab9a624617aeaefed2cda716fe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/81910273646.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/95918010365.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/airbnb_host_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://static.usrfiles.com/ugd/cc089a_2b6a117dfaa84731ba25146159a84977.pdf
    • https://static.usrfiles.com/ugd/6cf392_e4f32f47339c4d2fbc98e6d49f44ae6c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fa4.bin
796409501345d5e3bac8c8e52b49ac946abf8f759e5f6f07cf23ecd70ca1eeed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 5268 bytes
font_01_sfnt_off00008133.bin
0cb9ba4ff2ae15981aecf741d518719632ec08fc45dfb111f56839a662b973af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8133 12324 bytes
font_02_sfnt_off0000a7e8.bin
d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E8 16164 bytes

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