Malicious PDF — malware analysis report

Static analysis result for SHA-256 7230889fe36bcd1f…

MALICIOUS

PDF

72.0 KB Created: 2020-08-11 09:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d3c92484b829a1b9fca87560d940b1a SHA-1: c0ba978cf4471b9648b0f080c8f43f2207e00185 SHA-256: 7230889fe36bcd1fb180c78ad90f64dc00b75a6bb7c4cba2c0313acc4d530e07
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=mullerian+anomalies+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=mullerian+anomalies+pdf
    • http://gulewe.reference-press.com/uploads/1/3/0/7/130775934/8414d55f30.pdf
    • http://takas.jeffreybirdjr.com/uploads/1/3/1/4/131437792/kowokopenogedud.pdf
    • http://files.genevieve-faulkner.com/uploads/1/3/0/7/130775528/329717f268e934b.pdf
    • http://files.peacockpointontario.ca/uploads/1/3/1/3/131383933/tasukegutuwud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/14108835004.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5895/files/wiped.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/9219463538.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/denoising_autoencoder_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/4104567881.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/saniroxinu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/wenugafepipisufav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/traditional_approaches_to_the_study_of_political_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/76583712948.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_off0000ceca.bin
3ea68223dbcb80fb6d32a40c2435d5a603b6f5b82b5b3f13a21551f6d42957d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 4996 bytes
font_01_sfnt_off0000dfa4.bin
18e71d34b0d44629535d10f4ec05dc963af7f6e705c1307e9f826f8a94ff064b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA4 11312 bytes
font_02_sfnt_off000104d4.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104D4 4324 bytes

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