Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c74fe70257101c1…

MALICIOUS

PDF

35.4 KB Created: 2020-08-15 00:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f49f8605baf01862e1b6952d8aa5fa7d SHA-1: 698a7ccfd961c737f03a4cd4939a562e8f2bed75 SHA-256: 6c74fe70257101c117fa8ad8ec118b496edfd69eb16c45a8e8d9cd3aa4f813fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ttraff.cc'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass external PDF link farm. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users through potentially malicious infrastructure, likely for phishing or to serve further malicious content.

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=choral+music+sheets
    • http://lavujat.coleenthoulihan.com/uploads/1/3/1/8/131871721/xazuligesisof_vexikudomiro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/juwunotutuvodexozudok.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/mangastream_is_gone.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/viking_range_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/1995_lexus_ls400_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8065/files/tovetok.pdf
    • https://cdn.shopify.com/s/files/1/0435/4441/2314/files/gofalarusuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4699/files/beps_action_plan_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/11672476284.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/zogabefofiramefowejogez.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_off00004e69.bin
737c6b030a9340aa541b68d6bd3e49ecfb7e6cdfcd520499bb6383d31e78f955
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E69 4944 bytes
font_01_sfnt_off00005f0b.bin
0d4b9aab6d1228988bb0273a047e0ae07c65a86773a9aa0c0f0a6370362d7e02
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0B 10084 bytes