Malicious PDF — malware analysis report

Static analysis result for SHA-256 75eb3687f731711a…

MALICIOUS

PDF

45.1 KB Created: 2020-08-22 21:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41bfc0bbbd0bcc48c9dea741f91a7918 SHA-1: a003fa78c36546e15e2104898d3224d740161ba1 SHA-256: 75eb3687f731711ae60a96f8ce07ba4fbd11277d483278ace3c0c5b86e6de683
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify. The document body also contains this URL and numerous other links to PDFs hosted on Shopify and other domains, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded malicious URL is the primary indicator of compromise.

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=great+fugue+in+g+minor+sheet+music
    • http://files.diannebersea.com/uploads/1/3/2/8/132815791/fead9157f58c31e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/84125889523.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/50194365383.pdf
    • https://cdn.shopify.com/s/files/1/0437/6107/4333/files/mastoiditis_cronica.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/android_avd_manager.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/8067827318.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/nokumunesilopafiloxula.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/pobezekirupijotit.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/23727893687.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/calculus_7e_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/20549718979.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/97571182377.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f60.bin
9dfea55b3144f7bfb52a5b0f8dbe1f7b07ea70cdf6343672f6b2d568fb5ff26d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F60 5296 bytes
font_01_sfnt_off00006138.bin
1650e2e68a4f5b723fdc658b73340c15ae6bf10d70885c3a4c7e4a479c5a6b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 15016 bytes
font_02_sfnt_off00009065.bin
184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 16120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.