Malicious PDF — malware analysis report

Static analysis result for SHA-256 70204af96e466b1a…

MALICIOUS

PDF

33.6 KB Created: 2020-08-30 17:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c02e1d81b588dc7d8bb5f19ab5f628 SHA-1: 408f8bf1ee6ebc49957d0cdc6b6c96fd473ded17 SHA-256: 70204af96e466b1a10a9499ecf78cc1237e1dcbf5e02fa219ef6f0bb656a26ce
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including a critical redirector link to ttraff.ru. The document body, though heavily obfuscated, also contains this malicious URL, suggesting an attempt to direct users to a malicious site. The presence of many external PDF links, some of which are benign Shopify URLs, indicates a potential SEO link farm tactic to obscure the malicious redirector.

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=furiously+happy+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/3416/6694/files/index_match_excel_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/pdf_file_editor_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/42705908706.pdf
    • https://cdn.shopify.com/s/files/1/0433/7958/9283/files/registration_form_css_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/94077589476.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9506/files/permanent_product_recording.pdf
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/bejupinubolik.pdf
    • https://cdn.shopify.com/s/files/1/0450/9886/0707/files/monthly_timeline_powerpoint_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/gusomokepan.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_off000046ba.bin
16790b3939bbd67b7dc97c77c69abb9a64fe3c3efc80e82e5a085b39bbcb677a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46BA 5196 bytes
font_01_sfnt_off00005878.bin
02e0b23528ded5a991be76c1618b692cac6be975d72720d260b27c61aeb21d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5878 9892 bytes

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