Malicious PDF — malware analysis report

Static analysis result for SHA-256 9419b6a547605630…

MALICIOUS

PDF

48.3 KB Created: 2020-10-28 21:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ea0342afc376b2757b5523d6413a37f2 SHA-1: 1c7d9cb08e1abaddd9e8562302fe3000ea992d13 SHA-256: 9419b6a5476056306c0bda04ed6ef9b620e3830a6ba5d9dc49dba0a271fe56e6
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the document's structure and link farm behavior suggest it's designed to lure users to potentially harmful websites, likely as part of a phishing or SEO spam campaign.

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://gettraff.ru/aws?keyword=sharp+aquos+quattron In PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/lujivakuj-moxulebosevisix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5f98ddc519eba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f88d0617b4fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_5f8ceb7c1cb87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f97e645d58d9.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/5067064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409093/normal_5f98ef8b3c80b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f89a8210fcfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_5f91817c8760d.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/6544629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f9057b33592e.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/2996011627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/97110684721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a129c1f-81d9-4dd8-94af-b639ec3f5327/the_quarry_destiny_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/nevefavuwotunifapenesori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5698/7797/files/gene_mutation_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bdc8c1-7b47-4c20-9b8e-08a2e6119995/66573780157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/991015ae-d626-44b0-ba18-1dabe6eac8a7/49330047392.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/asvab_review_book.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_off00007d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1B 5104 bytes
SHA-256: d0ad3f9e3e51396b4766db1733184a7e3e6f276f024f450f429acd3f7a3cee26
font_01_sfnt_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 10940 bytes
SHA-256: 552fce9f6322a701439adc43a56c97b2e777624cf6a0aaa802550554bcf08629