Malicious PDF — malware analysis report

Static analysis result for SHA-256 1110d8bfa4830e90…

MALICIOUS

PDF

47.4 KB Created: 2020-08-21 07:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a4390458ab402f9a92a4075e688d3e SHA-1: 94a95ad6e7bfc7b374bc6565293a547105811a04 SHA-256: 1110d8bfa4830e90ce930f23bd7bac6a04637385a2ed40aec011c3934f4d5888
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to host malicious content. One prominent link, 'https://ttraff.cc/pify?keyword=minecraft+story+mode+season+2+apk', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL, suggesting an attempt to trick users into downloading malware or visiting a phishing site. 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.cc/pify?keyword=minecraft+story+mode+season+2+apk
    • http://xorape.sarahharveymathtutor.com/uploads/1/3/0/9/130969140/26c012.pdf
    • http://sulufuw.nscecommerce.com/uploads/1/3/1/4/131453526/debojijapuwuf_vuxukewa.pdf
    • http://penonekig.gvramigos.com/uploads/1/3/1/4/131407995/torarixi.pdf
    • http://files.dancingbythesilverymoon.com/uploads/1/3/2/6/132681342/furisuratafekavinex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2438/4154/files/bernstein_equity_research.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/dakevemonozejujovuzeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0927/7095/files/5969721502.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/gegexodolanizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/small_scale_aquaculture_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/boarding_pass_lion_air.pdf
    • https://cdn.shopify.com/s/files/1/0433/8676/5475/files/audi_a4_quattro_2004_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/bootstrap_4_form_login.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/brand_positioning.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/88383494722.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/jevapusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/vmware_workstation_14_pro_license_key.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_off00007bc2.bin
1d78a791538c3627f4b5185ab8d9385cd5440bfb0c0271e36cb12a6434624917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC2 5572 bytes
font_01_sfnt_off00008eae.bin
b35c913a87559f9bf5bf83c23e321bf0028014fa7eedfdc831d0076853eb7eb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAE 9980 bytes

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