Malicious PDF — malware analysis report

Static analysis result for SHA-256 19089122a1aa7b6e…

MALICIOUS

PDF

58.7 KB Created: 2020-09-19 05:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ca19cc71d5d3a1eb92a760d8be72a7 SHA-1: f31615ca868cc99029b494999c46516e160f0ab2 SHA-256: 19089122a1aa7b6eefbc8ca81f44a4b7de90ec4cf9dac74e942cb66929024da6
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free download for 'Neon shadow apk data', which redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm designed to distribute malware or lead to phishing sites. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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.link/wix?keyword=neon+shadow+apk%252Bdata+free+download
    • http://files.zestnaturalmedicine.com/uploads/1/3/1/4/131453291/lekeveteso_jetuvati_koxolivet_lemufatebavu.pdf
    • http://files.bandicootlodgecomedy.com/uploads/1/3/1/6/131607163/01d5f7769.pdf
    • http://nikepovim.pda4training.com/uploads/1/3/1/3/131378816/nosaxu.pdf
    • http://files.whitesidecfb.org/uploads/1/3/2/6/132681826/lizopa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/51372057196.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/vawus.pdf
    • https://cdn.shopify.com/s/files/1/0438/3355/7149/files/conjuntivitis_bacteriana_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/5819/0743/files/xuvosixiluvuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/47014379833.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9741/files/apgli_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1039/files/livro_epidemiologia_basica.pdf
    • https://cdn.shopify.com/s/files/1/0432/6362/3330/files/fornos_de_calor_envolvente_a_gs_mas.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/90680446487.pdf
    • https://cdn.shopify.com/s/files/1/0470/9430/0830/files/76994121905.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/tajejej.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_off00008dbe.bin
8bf3e5abe6c74bbc5c46118600a8ee32e7a2ff129836c229999598d59f2b6d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBE 3112 bytes
font_01_sfnt_off000098fb.bin
5afca34d547987b1655ea88cb9c71263d22001613c1edb6783415bd42d4ee86a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FB 5256 bytes
font_02_sfnt_off0000aaeb.bin
530cffa638d509205d1587eeba01fd26f9c937f5238425d12aea49eef9c3cf0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEB 16456 bytes

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