Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7308cf08a03859…

MALICIOUS

PDF

47.2 KB Created: 2020-11-03 14:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f06bcd5b99b0f1e3e9302a8f1107c0e1 SHA-1: b7557e762799274c77a815dc36423471b68795ae SHA-256: cc7308cf08a03859f5bdaf14a8e8cf3d9c98326093aded3888e4d352b298c635
184 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically disguised as a search result for a common query. The primary malicious URL identified is https://cctraff.ru/123?keyword=how+long+to+cook+a+frozen+digiorno+pizza. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users through deceptive 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 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://cctraff.ru/123?keyword=how+long+to+cook+a+frozen+digiorno+pizza In PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/juditirusewisen.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/de44069.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/3408965.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/3856059.pdfIn PDF document text
    • https://xinorexuvon.weebly.com/uploads/1/3/4/6/134608307/soluvudewidobog_repitinu_panalaxim_fabuwitabune.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/8162100.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/f7fa2.pdfIn PDF document text
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/4283359.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/7230269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nagev/iq_ball_unblocked_66.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/water_electrolyte_and_acid_base_balance.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/bopupexunifemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e9f59b-a948-4935-8a21-3e50f5008dbc/30267719162.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 5100 bytes
SHA-256: f1119f5ca1b7ce4f288d21ff073c75ff82ace37a54b93dae0b1b7f70bcae21a6
font_01_sfnt_off00007e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E24 10356 bytes
SHA-256: 876086ea91e0c8dfda859b89142dfdbab2f12f88b2af926b81e705659c8521d1
font_02_sfnt_off0000a15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA15A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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