Malicious PDF — malware analysis report

Static analysis result for SHA-256 2632212803cc9035…

MALICIOUS

PDF

44.7 KB Created: 2020-07-08 15:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 4c1389105abc45949ed9de84e9afadf2 SHA-1: 4022c837424be30b987f160ef6caba298d5f4ec5 SHA-256: 2632212803cc9035bfe317367e83ec22288d7d071c53484ef4724909de1bf6d9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, identified as a link farm, pointing to various PDF files hosted on different domains. One prominent URL, https://ttraff.com/wb?keyword=hyundai%20tiburon%202007%20gt%20manual, is flagged as a malicious redirector. This suggests the document's primary purpose is to distribute malicious content or engage in SEO manipulation. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://ttraff.com/wb?keyword=hyundai%20tiburon%202007%20gt%20manual In PDF document text
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdfIn PDF document text
    • http://files.ennoblesolutions.com/uploads/1/3/0/9/130969046/af46fa042851e5d.pdfIn PDF document text
    • http://files.webnova.net/uploads/1/3/0/9/130969082/f45a48860174c.pdfIn PDF document text
    • http://files.feltlifestyle.com.au/uploads/1/3/0/8/130874467/3324807.pdfIn PDF document text
    • http://files.crossfitantrim.com/uploads/1/3/1/4/131452794/mojoxizuwazeg.pdfIn PDF document text
    • http://files.lindalgraham.com/uploads/1/3/1/4/131455283/7d86161771d526.pdfIn PDF document text
    • http://files.lowellconcrete.com/uploads/1/3/1/4/131437648/fowak-jilog-gukulutiku.pdfIn PDF document text
    • http://files.airfiltersalesandservice.com/uploads/1/3/1/4/131406369/jifegavonapufudanu.pdfIn PDF document text
    • http://files.mendingmelanie.com/uploads/1/3/1/8/131856518/9025194.pdfIn PDF document text
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fivumemejome713149502.files.wordpress.com/2020/07/23592665225.pdfIn PDF document text
    • https://zolibuvove523289473.files.wordpress.com/2020/06/98006782788.pdfIn PDF document text
    • https://dinigituxog.files.wordpress.com/2020/07/79443825685.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_off000071c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C8 5288 bytes
SHA-256: 304d70128d49d06a308a0e806adcfe7847457fe0cf66730f6405db1f21632568
font_01_sfnt_off0000839d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839D 10144 bytes
SHA-256: c9d94b458713667a9c19c0efecaf26350787b31e9c151cd3ce2cb360233079a4