Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7dd94c2c7effbe…

MALICIOUS

PDF

57.5 KB Created: 2020-08-04 11:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a9d2969add0d622725c2fb4d4bfaf89 SHA-1: baa8d1028c3b8c39928cfc267b23724f0ff0e1ea SHA-256: 0e7dd94c2c7effbed06f567dc5d1c2161023aac99fa4487ae25882371adc63f9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of links, suggesting an attempt to game search engines or distribute content widely. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector.

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=double+bollinger+band+strategy+pdf
    • http://files.theaceso.com/uploads/1/3/0/9/130969986/ruxavubevamalozujusi.pdf
    • http://files.waynepyle.com/uploads/1/3/1/4/131437181/8474722.pdf
    • http://files.davidrsmithbooks.com/uploads/1/3/0/8/130813768/xipodonozivipokobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/briggs_and_stratton_5500_watt_generator.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/mobile_movies_hollywood_hindi_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/gefewag.pdf
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/68445436212.pdf
    • https://cdn.shopify.com/s/files/1/0440/6394/8950/files/kidupoborewukemudona.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/mozapedefajebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/17469693176.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/98760259090.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jidaxuno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000943c.bin
c2bd9fa4fdf5480db26c821c0ea9057c84fdd93cf424537bfc8c7ca93dd74811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943C 5332 bytes
font_01_sfnt_off0000a66d.bin
e37acfe752d9e81758a6a6ee3cf21094f27991082dcd0f0caf3261cadcf3ac8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA66D 10664 bytes
font_02_sfnt_off0000cadb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 4324 bytes

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