Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffac8cc00d22c3eb…

MALICIOUS

PDF

43.3 KB Created: 2020-10-14 18:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed889427d907d8d902dd6877e8d55acc SHA-1: b4f0a5fc53d288f5474f9073e0ddd46fad89d9d2 SHA-256: ffac8cc00d22c3ebd29713cfc7f3c5fae48ba2eda8aa4875fdbb4c5e14f38f07
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its function as a link farm, containing numerous external links. One prominent link, 'https://gettraff.ru/strik?keyword=gun+target+alarm+clock+manual', appears to be a redirector. The file's structure and the high number of outbound links suggest an attempt to manipulate search engine results or redirect users to potentially harmful content, aligning with tactics used in SEO spam or phishing campaigns.

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/strik?keyword=gun+target+alarm+clock+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8709a06bd18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f86f416a9ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f870ddf8bfbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f86f414cc3ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8717b4594ba.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/97041218469.pdfIn PDF document text
    • https://site-1043601.mozfiles.com/files/1043601/jiregezijetesomegizikepun.pdfIn PDF document text
    • https://site-1043328.mozfiles.com/files/1043328/wokozuwojuramipak.pdfIn PDF document text
    • https://site-1039534.mozfiles.com/files/1039534/megutuxadibuxolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f870f312127b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f87067ed3b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f871387c017d.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/govodijix_jarelu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/gewogudanibow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d86e74b3-390f-4222-8763-f46e773b5f71/74876366878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3efffb-b981-4eed-a969-72109cda5a52/89075757714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a722d19f-c33a-436b-af69-d4f83cd0fb7e/kajaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a77b1fa-61e9-4932-971e-490821729912/63234472663.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_off00006ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 5036 bytes
SHA-256: 59f7a44e50c3eec3c706853e37984495074fc014def059ac1a07d9634f4e94a5
font_01_sfnt_off00007dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBA 10060 bytes
SHA-256: fcdd237f66fd5ece10a8de49bc6aa2c817ef7decd632206ff0c94a6573d2c07b