Malicious PDF — malware analysis report

Static analysis result for SHA-256 47be7cfc453ebd34…

MALICIOUS

PDF

39.9 KB Created: 2020-08-03 01:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d28532de9862c65247a3d0e8bd965411 SHA-1: 281476f023e8e43db6b39713fe71fcaa69abe1c8 SHA-256: 47be7cfc453ebd3415039c3f7013edd4598815763a97340a35e5b751726f62d0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a redirector service, which is a common technique for distributing malware or leading users to phishing sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, including one to a known malicious redirector, supports this assessment. The document body, though heavily obfuscated, contains the URL that is likely intended to be clicked.

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=xbox+one+user+manual+pdf
    • http://files.log10llc.com/uploads/1/3/0/9/130968992/8884315.pdf
    • http://files.shoptheluxebaby.com/uploads/1/3/0/7/130739852/324726.pdf
    • http://files.lifemissionmanteca.org/uploads/1/3/1/3/131383541/modanitisarepa.pdf
    • http://files.strathmorechildrenschoir.com/uploads/1/3/2/6/132696171/4392120.pdf
    • http://files.delawaremusic.net/uploads/1/3/0/8/130813985/cd32ad34.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/90342061022.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/24608920040.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/40872472239.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/vojimavibej.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/duzawamitenopaniwofipum.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/51692788076.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/7469852775.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3356/files/mov_vs_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/73248244606.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/lenenijovigurakowixexila.pdf
    • https://cdn.shopify.com/s/files/1/0433/7667/2918/files/34208629732.pdf
    • https://cdn.shopify.com/s/files/1/0429/6369/7817/files/17600579499.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_off00005de1.bin
4229cfc89c894200476fc3e91868283bf7316badd7c103db390d6f568871543c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE1 5372 bytes
font_01_sfnt_off00007006.bin
6d602b0ee7145ee615e272e8e917409db7e68d3bc11e3c71fd70e7e71304dff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 10208 bytes

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