Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f8c56b29405af9…

MALICIOUS

PDF

39.3 KB Created: 2020-08-19 20:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96af962fc302cf683c8c1ea5cba4725a SHA-1: 5a85684b60e599e803665edd192ec89816fe3569 SHA-256: 66f8c56b29405af9a7113b0492672106fc55824ea3bb9a67951605b1c46d4d66
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 redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, contains the same URL as a link, suggesting an attempt to disguise malicious links within seemingly innocuous text. The presence of numerous external links, including those hosted on Shopify, indicates a link farm or redirection strategy to obscure the ultimate destination.

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.ru/pify?keyword=bosh+kala+shrine+the+wind+guides+you
    • http://files.kevinharpercpa.com/uploads/1/3/0/7/130775997/535ef39.pdf
    • http://files.albertastockdog.com/uploads/1/3/1/8/131857626/9824430.pdf
    • http://files.crosleycorporation.com/uploads/1/3/0/8/130874055/fumuvevusamapalif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/wasekikevubate.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/69648872687.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/93833318137.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/how_to_save_pictures_on_classdojo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/bamefojoxunuged.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/pig_dissection_diagrams.pdf
    • https://cdn.shopify.com/s/files/1/0435/9510/4418/files/zovibabanekutixipavizolam.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/world_economic_forum_the_global_competitiveness_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/8383/2227/files/chehra_masoom_punjabi_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/98126341565.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/71816693546.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/fowopoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/ammonium_chloride_msds.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/26265720779.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_off00005bfc.bin
e985f9295a23af071db1445718730c65379c2ced4dc17e2d34bf8b0e7ffdc96e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFC 5396 bytes
font_01_sfnt_off00006e63.bin
a628102bf9e2591d6f1f2aef3281d31aa495a2abed964b137e1f047855296439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 9908 bytes

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