Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1cf80fde22c8ae…

MALICIOUS

PDF

40.7 KB Created: 2020-10-28 09:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 46c0b8883dffaf50c1483faab568388c SHA-1: 377152d11a97a6cd0923d1c5fd3432e0f2fc976e SHA-256: fb1cf80fde22c8ae6339996181e783e20712fc818c1204438db5850f7af723c7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ggtraff.ru', which is used to redirect users to further malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/strik?keyword=sniper+3d+assassin+mod+apk In PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/muvimusodaze_pubepegorudag_gapebekorov.pdfIn PDF document text
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/eeddcd4d.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/476272.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/belanuwepubuseg-mexanutuxiburi-lesem-rutiwejipabuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f8a2240beb92.pdfIn PDF document text
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/vaxivuvozureg.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/889e0e9ecbd.pdfIn PDF document text
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/772a0cccdfe.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/xepop_zulajado.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/kolapabajiritu.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/japexovizabid-bomosewefum-kujimisix-givirako.pdfIn PDF document text
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/940008.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/1/0459/1737/2565/files/81834038058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/aiag_fmea_reference_manual_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7129/9480/files/sistema_inmunologico_introduccion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3294/9148/files/45126541379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04043742-859d-475d-abdc-27e3b2a74f29/catering_business_proposal_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad6a80f-dcb9-4369-bdb8-023c1aaca056/4764398510.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_off0000604f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604F 5404 bytes
SHA-256: 63f6229967678e39f0c2f3c87f52d5a23560329e06da60921c6f82c53b39de81
font_01_sfnt_off00007291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 10312 bytes
SHA-256: 7713d71053d5d2ba215105d9e37ee0d66e4e3b33fc0a8ab37cf68a74f2616b3a

Open this report in the interactive analyzer, or submit your own file for analysis.