Malicious PDF — malware analysis report

Static analysis result for SHA-256 70890039014c595e…

MALICIOUS

PDF

51.5 KB Created: 2020-07-30 16:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e5cf6d8e2488334be10cb070e2787b7 SHA-1: cf50d366918c10921dabae1c486a12c034002b9a SHA-256: 70890039014c595e54453e78df33ac313c85bce62c5b569cfd0da21c7ab73cc4
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector. The primary link, disguised as a search result for 'Berserk volume 17 pdf', points to a known malicious redirector. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious or spam content, likely for SEO manipulation or phishing.

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=berserk+volume+17+pdf
    • http://files.willametteleadershipacademy.net/uploads/1/3/2/8/132815370/43843c0cd597.pdf
    • http://files.toneeke.com/uploads/1/3/1/3/131398194/2bdad9b303.pdf
    • http://files.dididiphotography.com/uploads/1/3/0/8/130874250/4886248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4108/6888/files/fikiwegitazunek.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/4178153464.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/tosezavewenajoziv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/risuxavunaxuvumeruguze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/17431505941.pdf
    • https://cdn.shopify.com/s/files/1/0429/9420/4825/files/kilopaketivesoxut.pdf
    • https://cdn.shopify.com/s/files/1/0440/8174/1976/files/44305150925.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6565/files/noriko.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/81339995536.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/dolobudizaxejosoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/jinilekefowabeno.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1781/files/rekubodeton.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/66695572563.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_off00007178.bin
567785245ac8c48a8081ab0d3c573f4cfe183f6d5ea248ef48a10856f2931e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7178 3616 bytes
font_01_sfnt_off00007e59.bin
69db2017280d7b32901f286f031c0bab012c00f6a9c4e9ba25e605dbbd50f684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E59 4928 bytes
font_02_sfnt_off00008f37.bin
27bf1e3dae5aa2ac56b2fa7f4bde55dde7ae8f8564221e3585da0da74136670c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F37 15336 bytes

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