Malicious PDF — malware analysis report

Static analysis result for SHA-256 4519e57f34519f84…

MALICIOUS

PDF

48.6 KB Created: 2020-09-28 21:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 69dd1037c934d7839dfa47cc24a83846 SHA-1: 5bdd6c67ee279c1e84110b9e2f4ccd736fb0a124 SHA-256: 4519e57f34519f8416a36608852d5003be5a3f1798883b4c086c8be4d6e31ae4
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.club'. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or malware delivery.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=level+70+assassin+leveling+guide+ragnarok+mobile In PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/jepiwidajeputiti.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/95314857731.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/zufufokowas.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/ruvapidodal.pdfIn PDF document text
    • http://files.slowfoodcaterers.com/uploads/1/3/1/3/131379168/2559351.pdfIn PDF document text
    • http://files.lifetimecenter.com/uploads/1/3/1/4/131438419/49ba86.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/40118335387.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/durapukig.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/pebapetilesum.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/1/0482/9541/1867/files/maria_montessori_school_of_quezon_city_uniform.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_off00007eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAF 5572 bytes
SHA-256: ead3e7d70821c265cf0d4501f7e48937d1fc2db99502a98ed99aa7d899aedb08
font_01_sfnt_off00009197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9197 10476 bytes
SHA-256: a44df64769cf5aedc2ca98492b7c333598f712c30a3320857af8f99f35e25da3

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