Malicious PDF — malware analysis report

Static analysis result for SHA-256 02323e196e700463…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 20:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82048a97b94408866f2ac0850214f465 SHA-1: 09edbb64743521a535bc1fbbcd5aa61819b0547d SHA-256: 02323e196e70046378fa6294a842fa98c75c03fe8ca71db335e556507836f652
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to a malicious URL, specifically 'https://ttraff.ru/wix?keyword=nikola+tesla+slayt'. This is further supported by heuristics indicating the PDF links to known malicious redirector infrastructure and a large number of external PDF links. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking it. The ML classifier also strongly flagged this PDF as malicious.

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=nikola+tesla+slayt
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/gojixosezokorira.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/zoremoxobapasefuketuxi.pdf
    • https://cdn.shopify.com/s/files/1/0449/3587/2667/files/bcsp_code_of_ethics.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/83567092660.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0070/files/14094277577.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/62624466261.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/bugadiwazogivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7637/files/canon_ts6020_scanner_driver.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/99870575534.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/eso_woodworker_survey_craglorn_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/88689749148.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_off00006af8.bin
3b9e66699b06ccefc1bc328620ca1d3ef7764d55882e3c4f6d754a37e207f917
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF8 4400 bytes
font_01_sfnt_off000079ef.bin
b1954c406825224524e77d2412a6f62df909976022a18e4422ad034c1af4e7c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x79EF 11220 bytes
font_02_sfnt_off0000a003.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA003 4324 bytes