Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad98847a9a78595…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 02:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63752ef08423d3503320b1f4da002e98 SHA-1: 46cc29a0bb37397c3b257c0722eff29a53e73881 SHA-256: 6ad98847a9a78595c3e8c5ae0255111ac0a3baa336ea6b766ec3e1f5d50b54cd
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=candy+makeup+beauty+game'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting potentially harmful content. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely 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/pify?keyword=candy+makeup+beauty+game
    • http://files.thepatentshoppe.com/uploads/1/3/0/7/130775242/4a993a2.pdf
    • http://firijazo.phoenixlefae.com/uploads/1/3/0/7/130740596/d4ad822a6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/section_34_of_arbitration_and_conciliation_act.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3039/files/teaching_characterization.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/70629394092.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/google_forms_multiple_text_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/kenmore_elite_refrigerator_not_cooling.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/81000486739.pdf
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/74640574791.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7020/files/gexawubo.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_off00006933.bin
c6e0254bae29a1bfaa165c02ed5902c8197c52cc7df4abd2a1655a073629dff6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 5184 bytes
font_01_sfnt_off00007ac9.bin
c1fe7f084c63963fe5c8cd5d565851ae30d71dd06477465402b4fcba57291bbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC9 10304 bytes