Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ab37cb2fa41859…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 08:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 256b9505bbe78d45a9beef5b47eb1202 SHA-1: b4a7bd3301be7e2cd93813ae0a5a616e8a63b343 SHA-256: 75ab37cb2fa41859321437ba40c53e984c0095fc0ed2e8284997cdd68e16a532
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=bebas-+tam+font+free'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting it. The presence of many external PDF links, some pointing to Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination.

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.com/pify?keyword=bebas-+tam+font+free
    • http://zisafi.7akawati.com/uploads/1/3/0/8/130813780/sunafajetuko_zaweduve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/gejadewigevakowukigomakif.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/henri_cartier_bresson.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/settlement_agreement_cover_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/angina_de_pecho_complicaciones.pdf
    • https://cdn.shopify.com/s/files/1/0439/3979/1003/files/aprendizaje_social_y_desarrollo_de_la_personalidad_libro.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/zupatixeze.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/supizazajilifekoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/zibowosakefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/33326655202.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_off00005e47.bin
f10ffb797c6a4accd08f372247912da1ec902c09a2524517d6d21662e30054a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E47 5100 bytes
font_01_sfnt_off00006f8f.bin
88a13e357c5091eceeea256fd74ae009193bfec8edd278011e1dc02afd9d4d9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8F 12324 bytes