Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfe496f4f068a32…

MALICIOUS

PDF

32.4 KB Created: 2020-10-03 23:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8567df7138378054234b7994d2730afe SHA-1: a1dcdc6b971ca50b69500f60ac6bddca2976d60d SHA-256: fdfe496f4f068a32e75618387a06d85cb0f6f39a167cb4a45ef4a4cc53fbb0a4
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains and are likely part of a link farm designed to obscure malicious redirectors. The primary malicious URL identified is https://cctraff.ru/strik?keyword=driving+rules+in+tamil+pdf, which is flagged as a known malicious redirector. The document body itself contains garbled text but includes the malicious URL, suggesting an attempt to disguise the true nature of the 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/strik?keyword=driving+rules+in+tamil+pdf In PDF document text
    • http://files.hopebiblechapel.org/uploads/1/3/1/3/131380942/3036609.pdfIn PDF document text
    • http://files.julianoshea.com/uploads/1/3/1/4/131453807/jibumojexoje.pdfIn PDF document text
    • http://files.didntwakeupthisway.com/uploads/1/3/1/3/131379622/wofeziti_jalos.pdfIn PDF document text
    • http://wewisinek.dsppsu.com/uploads/1/3/1/4/131406688/govelunelelanuxet.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/famudibefoxadijazeped.pdfIn PDF document text
    • https://site-1040251.mozfiles.com/files/1040251/87115371660.pdfIn PDF document text
    • http://semijup.besthairextensionswilmington.com/uploads/1/3/2/3/132303189/tamofunuxajeb.pdfIn PDF document text
    • http://popari.jessiedphotopromo.com/uploads/1/3/1/4/131437181/funudo.pdfIn PDF document text
    • http://japawitor.jarkoch.com/uploads/1/3/2/3/132303093/suvejinixerunujen.pdfIn PDF document text
    • http://funorofaz.ripeta.com/uploads/1/3/0/9/130969627/zupagikaruzam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/45775761930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4061/0725/files/vejewubinediteroroworubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0337/1935/files/depikinimebanejoxavo.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_off00004515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4515 5420 bytes
SHA-256: 5ef1c18bf6064c5019e01df41103f0d1f5a118bcf34c8050d21054b039bee95f
font_01_sfnt_off00005781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5781 8764 bytes
SHA-256: d7cbcad5567e23ac83c5c1bcf85cb376657d649e84d585bcd32bd392af105926

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