Malicious PDF — malware analysis report

Static analysis result for SHA-256 4393f90d9e6d9b85…

MALICIOUS

PDF

44.7 KB Created: 2020-08-16 19:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7591f55cf3ec1e71942d456c9475143 SHA-1: 369d9c092217bcce1ea4e2e29c5acfe8bf8d1236 SHA-256: 4393f90d9e6d9b853d5e7cdecd90bc75618f00daff3c834d0ab9cacead15d93b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many of which point to external resources, a technique often used for SEO link farms or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=causes+of+inflation+and+deflation+pdf
    • http://popali.clearerskiescounseling.org/uploads/1/3/1/3/131379578/7809875.pdf
    • http://files.leandremeldener.com/uploads/1/3/0/9/130969190/3481642.pdf
    • http://rokaz.marthas-kitchen.org/uploads/1/3/0/8/130874104/wanagekekumaxavi.pdf
    • http://files.goodwinbiotechnology.com/uploads/1/3/1/0/131069789/mevenobomolirokeb.pdf
    • http://galowoko.valetridents.com/uploads/1/3/1/0/131070161/nukit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9736/files/caballo_de_troya_coleccion_completa_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/driver_printer_brother_mfc-_j2330dw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/sizumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2169/6149/files/metro_exodus_fov.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/multiple-_step_income_statements_show.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/44763099364.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/zewudewukubifaje.pdf
    • https://cdn.shopify.com/s/files/1/0450/4364/6614/files/oxford_discover_1_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/rajeredobivup.pdf
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/vijuxojugifajumevas.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000717b.bin
3e321ae093cac6ab779ae319a91a06af176cfdbb0d8a178c5baf8035410c4608
pdf-font-stream PDF embedded font (sfnt) at offset 0x717B 4844 bytes
font_01_sfnt_off00008206.bin
025367611db68f97a5acb476cc40100699cc1fee957f600a8f6e6cf979841d8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 10520 bytes