Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da907f93b5e4534…

MALICIOUS

PDF

33.9 KB Created: 2020-08-30 10:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85d85a16465a44cd3fcb459f1f0a51e SHA-1: ec7400f21dad2140f4ea60c083f2b0a66825ba17 SHA-256: 0da907f93b5e45340bf8c26e0053d09b5a196b018314641e22db18041784c613
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=mi+nueva+vida+en+cristo+volumen+4'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, while some are benign, indicates a potential link farm strategy. The ML classifier 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.com/wix?keyword=mi+nueva+vida+en+cristo+volumen+4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/15671217224.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/cloud_computing_interview_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/kiwadifiliwuruvidulanutaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0856/4127/files/relaxuleje.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/87617070897.pdf
    • https://cdn.shopify.com/s/files/1/0433/6785/8334/files/34007505247.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5989/files/solax_inverter_spec_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/bernina_artista_180_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4640/files/viwokelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/94349079065.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/1756037847.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_off00004341.bin
2c4291c0c76b8444d9b9e7fc0cafdc1b9930822f0f3f7302264cac88ea57b0f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4341 5236 bytes
font_01_sfnt_off00005506.bin
603f453a3865fc9534057708a1df7a035496e0bb0ec347443c62f63f00ee905d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5506 11176 bytes