Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f788bf35b5dc859…

MALICIOUS

PDF

41.9 KB Created: 2020-10-11 02:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 14d02cadf349afc4bc42a01718c8a5b9 SHA-1: e9f91f77ff8e6b486a59b1658134093e62653fbf SHA-256: 3f788bf35b5dc859dc9b6fa7088fc4d2dafb11218c709ebca3510ad832c8e919
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=the+cartel+book+1+pdf In PDF document text
    • https://site-1043353.mozfiles.com/files/1043353/44168595955.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/20022948538.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/mipunuvideduk.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/xebubemukoxobatel.pdfIn PDF document text
    • https://site-1040780.mozfiles.com/files/1040780/91710825363.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/78938869731.pdfIn PDF document text
    • http://dojegutux.creatingmedia.org/uploads/1/3/0/7/130739826/sabunej-fekujix.pdfIn PDF document text
    • http://files.illlaladesigns.com/uploads/1/3/0/7/130740625/94f3e9ddfc.pdfIn PDF document text
    • http://files.lumenhsceconomics.com/uploads/1/3/0/8/130873983/jokudemakalipobojad.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/1/0434/8831/3506/files/octahedral_molecular_geometry_bond_angle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5647/6572/files/grass_scientific_name_and_family.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/56877420134.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_off000065fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FE 5268 bytes
SHA-256: 2667ba0f671605c3b7c2c654026fb3b9843a5088689d12c50c997fc2558a93ea
font_01_sfnt_off000077dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 10392 bytes
SHA-256: 3f869237dde619d99b174653321b2186e9e206dc3156c83936ec787ed9d2aa8c