Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4ca5f39ee77e28…

MALICIOUS

PDF

39.8 KB Created: 2020-09-30 04:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 768fb12a888a19d49ad4017d08c130c6 SHA-1: b6c3bd2c07fa03f8d74f9dd41151c5d956520450 SHA-256: 2a4ca5f39ee77e28d55110cee81e5cbb84d9c98fc0366f686c66cd51204e1a3a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, likely as part of a phishing or scam campaign. The document body and embedded links suggest a lure for free PDF downloads, which is a common tactic for distributing malware or leading users to fraudulent sites. The presence of multiple Shopify URLs, some marked as benign, indicates an attempt to blend malicious links with seemingly legitimate ones.

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://ggtraff.ru/strik?keyword=barrio+bravo+libro+pdf+gratis In PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/17940581789.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/87586171938.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/46235898657.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/84412004191.pdfIn PDF document text
    • http://files.gmhpn.org/uploads/1/3/2/6/132681315/969284.pdfIn PDF document text
    • http://files.centralmathshub.com/uploads/1/3/0/9/130968984/gusofafufir_koxod.pdfIn PDF document text
    • http://pagexome.mygreerranch.com/uploads/1/3/1/0/131071290/6624877.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/hosting_company_website_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8879/0179/files/covax_aim_trainer_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/zogiwik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/52021697021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/wisigitobesujobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/visual_basic_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/enter_sandman_chords_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/latixegive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/alcatel_lucent_4029_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5460 bytes
SHA-256: 6b250c5467353bbbb9ddc13039349471e2eb7e893a578134a72c7cbd5d4a259f
font_01_sfnt_off0000702c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702C 10084 bytes
SHA-256: befe685057d1cd81d86e58e87c894a519aa5f30d249af648e1e1902d2c5e551d

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