Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae5bc2a0c107e5a…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 09:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e727e9ac2d223d8835a6372b7f00ef7f SHA-1: ece3c6b84c8b534476842c0bfe1df97d6745e1b2 SHA-256: 5ae5bc2a0c107e5ac1d336d0a02b31f568883abf3e05444a8d1b156e6db5dd4e
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 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests an attempt to mask the malicious link within a larger link farm, potentially for SEO manipulation or to hide the true destination. The ML classifier also 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/pify?keyword=the+addiction+treatment+planner+free+pdf
    • http://nexikapog.concretegarage.com/uploads/1/3/0/8/130814769/327d10d.pdf
    • http://files.kallerasinkangas.com/uploads/1/3/0/7/130739131/daforanoxobogeveza.pdf
    • http://files.wildabouthomefoodtravel.com/uploads/1/3/0/8/130814390/b569b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3471/9909/files/vigedu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/66974270831.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/construction_management_halpin.pdf
    • https://cdn.shopify.com/s/files/1/0433/7873/7302/files/pediatric_anesthesia_books_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/61665727613.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/22361637355.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/thyroid_gland_structure_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0436/9406/3770/files/pudiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/fl_studio_free_crack.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/wokosimixaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/regilukusurudiruxipenom.pdf
    • https://cdn.shopify.com/s/files/1/0434/9689/8724/files/40495850110.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/83868320877.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/28967898311.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_off00006e6b.bin
55e2df223cfa8518d961fd0a83c13ddd1a343ac5865eb37bdbddb0d3ca8867e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 5164 bytes
font_01_sfnt_off00007fd0.bin
ac9f2fea33730b40f37a73b477833fe3ade5da0c113becfbc76e266e93b42834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD0 9872 bytes

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