Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f63dbec7730a6b…

MALICIOUS

PDF

40.6 KB Created: 2020-08-19 06:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ed6c3faf91e0fdba2a698fca82e78e SHA-1: f1ed7d95b85a739cdfe87a8308e632018f68f62d SHA-256: 17f63dbec7730a6bf811038f62e15c4c3d8d457e0a08a4e792c07a455c92626e
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as sheet music, aiming to trick the user into clicking it. The link leads to 'ttraff.cc', which is known malicious infrastructure. The document also contains a large number of links to Shopify, likely part of a link farm to improve SEO for malicious content. No scripts were extracted, but the presence of embedded URLs and the ML classifier strongly indicate malicious intent.

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.cc/pify?keyword=gabriel%2527+s+oboe+ennio+morricone+sheet+music
    • http://sazefagog.tpcaausa.com/uploads/1/3/1/4/131406744/xatujaji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikujolam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/81489131848.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/butepe.pdf
    • https://cdn.shopify.com/s/files/1/0443/1101/9676/files/problem_solving_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/81040226079.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/11406199228.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/80651016157.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/our_global_environment_a_health_perspective.pdf
    • https://cdn.shopify.com/s/files/1/0433/5291/6119/files/deruxejekaxuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/74411490701.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_off000052c3.bin
d11edcadc31f0d5b9174263bc733afbcf17f152b9b27d31595834065485f3e68
pdf-font-stream PDF embedded font (sfnt) at offset 0x52C3 5244 bytes
font_01_sfnt_off00006477.bin
6754fc2c1fd3433d2a8e2ffb24adb6a6730718134f50b400c29496916b4de591
pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 14724 bytes