Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc6d44732f275bd…

MALICIOUS

PDF

57.6 KB Created: 2020-12-24 12:35:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 58b99b2f657138c61ebb7ee7f5876359 SHA-1: 2b7f463db8fe32c0724f1beb88c7ef098d22858e SHA-256: fcc6d44732f275bde880e627cf97fcfc7542b1452ce02885dfb59f0bc45ea7af
182 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files hosted on disposable domains, indicating a link farm or SEO manipulation scheme. One URL, 'https://traffmen.ru/aws?utm_term=3ds+max+tutorials+pdf', is identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8774

Heuristics 4

  • 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.
  • 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://traffmen.ru/aws?utm_term=3ds+max+tutorials+pdf In PDF document text
    • https://xulisonifob.weebly.com/uploads/1/3/2/6/132695361/cafa2.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/hfp5Eia/zusakodevaxerileroguta.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/jinutagelawizinota.pdfIn PDF document text
    • https://bixirugabo.weebly.com/uploads/1/3/0/9/130969405/dofezevenej_nedunobikivu_xarexa_kafumefarile.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/Gjeorhc/62714147065.pdfIn PDF document text
    • https://dawopurasujup.weebly.com/uploads/1/3/0/7/130775219/4975814.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/4HFghgi/turbo_card_customer_service_number.pdfIn PDF document text
    • https://jebezefekoju.weebly.com/uploads/1/3/4/7/134737834/a686211695.pdfIn PDF document text
    • https://bobilomagavakux.weebly.com/uploads/1/3/4/8/134868487/wejij.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/5251538.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/a537b.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/fheidii/jajoloxarelox.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/d780e642-0044-4532-957b-5ed27d6add70/nukisuvonopuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc4cd13-c750-4a7c-8368-57c0939ecb7e/33598614604.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/50818378131.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/desuzikeropasi.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DC 5324 bytes
SHA-256: e56869c0b8fbfb27c9f08a09f9ce14f987597898daecedd2495b78f65301a4b7

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