Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd7d5ffda50a8aa…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 16:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 252eb554fd344480feef6210ce1ad414 SHA-1: 031a333a6ce9f64a2920e8ac403c1399facc9d4f SHA-256: 5bd7d5ffda50a8aa23611dbbcab3c1c01d28a9ed6536f878280f7fc10d83e3c1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=garmin+vivo+smart', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=garmin+vivo+smart
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0457/6211/7788/files/the_most_dangerous_job_eric_schlosse.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/61122768650.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/petsafe_1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/priority_mail_express_1-_day_delivery_directory.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/vonisufiwavuberopijizape.pdf
    • https://static.usrfiles.com/ugd/b8c837_25f619fe66cf499da623bac0f75446b7.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/baaghi_2_movie_video_song_videoming.pdf
    • https://cdn.shopify.com/s/files/1/0468/0689/2695/files/16699898533.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/meleroxarodumewoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5756/0217/files/friction_factor_for_smooth_pipe_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/whatsapp_status_sad_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/mac_os_catalina_size.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_off00006f29.bin
cb09f411df9a99dcaa4cf45678dc80033fe806e288a237db2a84802caf5d8fa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F29 4888 bytes
font_01_sfnt_off00007fb7.bin
2c32f7ec759517fcc8cd03f738456a82d90819d2cf474256a1df9c69a1bfa772
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 15180 bytes