Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da55b545960b667…

MALICIOUS

PDF

69.2 KB Created: 2021-01-15 09:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 32aeda3a8f052519c9ed7587b63e6a15 SHA-1: ed821ff7fc21a5dd8cd6dcbd862e6c60a0b7a146 SHA-256: 6da55b545960b667ab413d7da615e47b6c5f23695a19c7b5ce8de5c7312a895a
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded URL 'https://cctraff.ru/123?utm_term=calera+high+school+football+schedule+2020' is presented in a way that mimics a search result, likely to trick users into clicking it. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://cctraff.ru/123?utm_term=calera+high+school+football+schedule+2020 In PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/73179efb5.pdfIn PDF document text
    • https://site-1172648.mozfiles.com/files/1172648/irrigation_engineering_notes.pdfIn PDF document text
    • https://site-1176492.mozfiles.com/files/1176492/99884023936.pdfIn PDF document text
    • https://gadebalemalun.weebly.com/uploads/1/3/4/4/134443756/11208b.pdfIn PDF document text
    • https://site-1174866.mozfiles.com/files/1174866/wodokaxafabinonurono.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/diy_pom_pom_pokemon_book.pdfIn PDF document text
    • https://site-1177655.mozfiles.com/files/1177655/sawumegigilaniremejak.pdfIn PDF document text
    • https://site-1192107.mozfiles.com/files/1192107/baby_panda_run_apk_download.pdfIn PDF document text
    • https://site-1176306.mozfiles.com/files/1176306/windows_10_updated_iso.pdfIn PDF document text
    • https://bomitepoz.weebly.com/uploads/1/3/4/8/134895739/dodexose.pdfIn PDF document text
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/5638a7e17f9cd8a.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/sowewazulejewi/nofiwop.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/toronto_fun_guide_registration_dates.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_off0000d051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 5600 bytes
SHA-256: 29285d9c500162a011773fe1801d353cb621d10f59ab6f9b912fc9b2aff0966e
font_01_sfnt_off0000e350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 10768 bytes
SHA-256: 80c54574fdd116e1d93d986c6162cebb480cddf64ce758b67c63c600cc96a956

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