Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff11c69bf4abb69…

MALICIOUS

PDF

62.1 KB Created: 2020-11-18 13:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e0fb58a2b4577077477235f6c91930e9 SHA-1: 20412eaefcca79facca02a0e7683596778a6bbb2 SHA-256: fff11c69bf4abb698c78d5f4777037ba4c282fee5e6d68409e856311ece2fbcf
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or malware delivery attempt. It contains a large number of embedded links, many of which point to redirectors or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The primary malicious URL identified is https://gettraff.ru/strik?utm_term=mass+media+law+pember+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=mass+media+law+pember+pdf In PDF document text
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/17b0dc17a4bde6b.pdfIn PDF document text
    • https://xoniwolujejusun.weebly.com/uploads/1/3/4/4/134456196/rejopago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_5f991a96bc560.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/3854939.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/sifukisivud-kalaligitakep-sinefolofuzuwit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f9a1c3621160.pdfIn PDF document text
    • https://munerotilaxamo.weebly.com/uploads/1/3/4/4/134476206/finuwibelifusigi.pdfIn PDF document text
    • https://delevesep.weebly.com/uploads/1/3/4/3/134371082/sekutibat_bikofize_fomovi.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/dovinugefupe.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/595f1a2f-30e8-42e0-ba13-21925d0aa621/manual_cigarette_roller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724ca951-89d5-4e39-b723-aa0fac96cb7a/mezowinixagivikujepar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67378d7a-c8ed-4ac9-89dc-06497cd4cb8f/38090632302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56488054-40a9-41d1-820d-05f186d4da97/nursing_care_plans_for_infection_prevention.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35523d4-541b-4fa4-9bcb-5d2250ebeabd/topdog_underdog_play_author.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_off0000b3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C0 5424 bytes
SHA-256: 72fe21c0116405c5b3952ff83f878fbf7b1d8e09038463d629742b21edc9ba52
font_01_sfnt_off0000c62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62E 11136 bytes
SHA-256: 6bd7bb7b8549e9d9c4f7020cd74332db611871a735ee10ba49901bccaa84d271

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