Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5d3c59fbe8006f…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 20:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b134bcce1a8275ef3a3f9f6066abd98 SHA-1: 4f3699a0854db9d07b0dccf385e50e5b19a798e7 SHA-256: 0a5d3c59fbe8006f4e7ba1a3154850d072ecb906b9433851d69d622995208fe0
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body, though heavily obfuscated, contains a URL that appears to be part of a lure related to the 'seven wonders of the world'. This suggests the document is designed to trick users into visiting a malicious website.

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.com/pify?keyword=seven+wonders+of+the+world+pdf+file
    • http://files.uniarq.net/uploads/1/3/2/6/132682232/begitegof_ranunenomipawag.pdf
    • http://files.benjaminsmithfineart.com/uploads/1/3/0/7/130740571/soviji_jufevotuziloxu_mirisozonezegi.pdf
    • http://files.dragonchoirs.net/uploads/1/3/1/3/131383664/zefagiri-dowezomerilajor-valamolilim-gobekebunezifon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/green_felt_klondike.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/jekotovununoxowubamep.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8437/files/juzazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/bovoxiwekaxikojokonuxonod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/zuvibud.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3795/files/deguxiwibazejazewedom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7527/files/stages_of_academic_writing_process.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/austronesian_migration.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_off00007357.bin
afbe8a523a43701ed68d13de283c355260c81c0a549f21839ad631e0eee2308e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 5172 bytes
font_01_sfnt_off00008504.bin
335bc7d2a46e2c319c77744a61f589eb756444550f5b7703792a97e5fd89f2c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8504 10352 bytes