Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6584dfd10ec1793…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 00:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be4002e178c287d58151569c55db69f8 SHA-1: 3e9116bed5f55b1da9fae90b10c7428224a3ca21 SHA-256: a6584dfd10ec1793b412af2ac095b58f91c983b50e3a91d4fbfda415a99b22ad
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify, and at least one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or redirection attack aimed at leading users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=hashinshin+jax+guide+s8
    • http://files.stevannovakovich.com/uploads/1/3/1/0/131070051/5961779.pdf
    • http://zapefemal.aide4paws.com/uploads/1/3/0/9/130969627/supivol.pdf
    • http://jukobeni.alterraocean.com/uploads/1/3/1/3/131398455/4014213.pdf
    • http://files.stmartinoftoursomaha.com/uploads/1/3/1/4/131406403/ludinusifebafim-xofisetas-sudido-logekaz.pdf
    • http://files.petrapreschool.net/uploads/1/3/1/4/131454262/314fdf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/14684548406.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/monifijisegaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/archivo_ingles_a_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4312/files/bebiluwubif.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/cypher_system_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/11954979920.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/2856873937.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/votagokexigiloxojaxon.pdf
    • https://cdn.shopify.com/s/files/1/0432/2836/4968/files/34720790562.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005980.bin
687aa288c6bdff8373bbea49f47696c1cf9a0dfddbd57283725a7ead3ec9c46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5980 5260 bytes
font_01_sfnt_off00006b54.bin
5fd181b8365bdeea766f344ce43947ebdb186da5597574299ac5ab54e0ab8249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 10484 bytes
font_02_sfnt_off00008f70.bin
51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F70 16148 bytes

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