Malicious PDF — malware analysis report

Static analysis result for SHA-256 128b659b4c02db5a…

MALICIOUS

PDF

75.6 KB Created: 2020-12-17 19:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e0c02fce58c15df91ccc7798c049a6bf SHA-1: 4f0a15c619add148c9d6ee4334dc53e872f45740 SHA-256: 128b659b4c02db5a90c146ea4551ea9bc42197f515ac2f895299cf580cad6386
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to funnel users to malicious sites. The primary malicious URL identified is cctraff.ru, which is flagged as a redirector. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/strik?utm_term=star+wars+license+plate+frame In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405202/normal_5f9a0d778c9c3.pdfIn PDF document text
    • https://tozupefiga.weebly.com/uploads/1/3/4/2/134265365/4db6023.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/4229523.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/binuxigaxufurob.pdfIn PDF document text
    • https://tojibigunezo.weebly.com/uploads/1/3/4/6/134644172/5342111.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/150633.pdfIn PDF document text
    • https://tujebikofo.weebly.com/uploads/1/3/4/3/134359874/sefowutosunotugor.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/falevi/types_of_classroom_management_approaches.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fc2a58318e72e5fdb2e723c/1606591876617/vixia_hf_r800.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/53012258362.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/free_bullet_journal_printables_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1fa8793968640865e0/t/5fc8861013f8d93bf2076ee9/1606977040466/36386698813.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 5356 bytes
SHA-256: 71ad25728720a95cb6f808e12d49241f5351fea616f188d2905fe7d0d0a42c26
font_01_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 10320 bytes
SHA-256: 7031650245d6a7fb7135a386839993efb6ea60cdaf27830de834a5bafce3c3a9

Open this report in the interactive analyzer, or submit your own file for analysis.