Malicious PDF — malware analysis report

Static analysis result for SHA-256 5472c8b1b1e9f264…

MALICIOUS

PDF

43.2 KB Created: 2020-11-04 07:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 64beec0f5f47523f9caa0d23da9efd90 SHA-1: e07dc109c2a0578b17f82de3a21c51fbc1487cc4 SHA-256: 5472c8b1b1e9f2649a491e310e49a9f8603a3241e6b61240693233f817e991c4
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'cctraff.ru'. The document body, though heavily obfuscated, contains a URL that matches the redirector. The ML classifier strongly indicated maliciousness, and the presence of multiple links to disposable hosting further supports a malicious intent to redirect users to potentially harmful content.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?keyword=mercedes+w124+workshop+manual In PDF document text
    • https://labiduto.weebly.com/uploads/1/3/4/5/134584073/gutuzojemetu_megatunikuxufek_gazesoxosubeno.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/rowevusadutip-fuduzep.pdfIn PDF document text
    • https://valoxapemep.weebly.com/uploads/1/3/4/3/134305175/vizobejipezoviwi.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/gopabi-xixiko-donodije.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/tekisaju.pdfIn PDF document text
    • https://gifedoku.weebly.com/uploads/1/3/4/2/134234788/bigajozemexolane.pdfIn PDF document text
    • https://judunelikirolo.weebly.com/uploads/1/3/4/3/134375477/mesevuj_soxepa_gepanovudul_xizekomome.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/34028fe4-9757-4738-be4f-08eddf127ad9/free_nurses_drug_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d095320e-00de-4f1b-82dd-a1dcc8a09a1c/ap_seminar_eoc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5110d91f-c6ea-4112-bb59-5059ebbfc9f9/peliculas_de_rapido_y_furioso_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10e6f80-bbad-4e59-831b-60783a993219/47008259135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc458f64-f188-417b-982f-41de5b4866df/59797325833.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_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 5748 bytes
SHA-256: 1515f35048af3ecb974942390faabdcb97963806d08ba23183c9c042cd6249db
font_01_sfnt_off00007e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0D 10000 bytes
SHA-256: 54d97213658ee613be5ae978948b9d0fbf841bc79709e9742586d2826cbe92d7