Malicious PDF — malware analysis report

Static analysis result for SHA-256 712fd04faea25674…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 19:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edeb2dea81bc0a3d900cfe423696ee5c SHA-1: 47f0f8c0e139ac21ea923c41adb8297c58508775 SHA-256: 712fd04faea2567487bea968b87e62fbd4252d05d09bd57cf4dc63c2af3321ab
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure for product instructions, aiming to trick users into clicking the malicious URL. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=mainstays+4+drawer+chest+instructions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/37297335296.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/pdf_file_to_word_file_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/billionaire_branding_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/76039746295.pdf
    • https://cdn.shopify.com/s/files/1/0447/4057/5381/files/agricultural_economics_mcq.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a102dd05cd640c09c166b36a8101432.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c18c599f1804bd293cf5e7b71338cb3.pdf
    • https://static.usrfiles.com/ugd/0df15e_87d7172cb517434aa7dbb42cfff5112f.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/xupajavozifaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/9589/1871/files/6221023953.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/kalupunuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/xufubuwesiza.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_off00005e7f.bin
75a5114522269476395cd4572ca3665f5ea8aa0f03f49da7c50b03dbb84daf57
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7F 5280 bytes
font_01_sfnt_off00007086.bin
d262813dfd6e3d774471727b34b5f1c8c21b27fdc42b717370a18a20ae46b633
pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 10724 bytes