Malicious PDF — malware analysis report

Static analysis result for SHA-256 597b80f455a9560a…

MALICIOUS

PDF

43.9 KB Created: 2020-10-30 12:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 79ad45742f357cb689fce12950e103d8 SHA-1: 7faef8a10a7705f060f4dd947dd52ec43149f85a SHA-256: 597b80f455a9560a2a0cb4cc644cb19432bbe1097ec4f17be578f03b26551384
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, cctraff.ru, which is likely used to distribute malware. The document body also contains this URL, suggesting an attempt to trick users into downloading an APK. The presence of numerous external PDF links further indicates a link farm used for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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=download+spare+phone+apk In PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/vofokimuwunoxurafut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f9ba127971c9.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/bexedokixirop.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/disizofevupoteja.pdfIn PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/7136087.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/dd070f7.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://cdn.shopify.com/s/files/1/0431/6079/7333/files/47094426670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/holden_barina_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3970/1164/files/15810223569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/31434368256.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/65222607933.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/lipexogiwajizug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8197/1908/files/22652389536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4309/3142/files/hydrotherapy_in_physiotherapy.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_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 4860 bytes
SHA-256: b9a2749b15542a7140d3b51b180623dcf0fb1503e6d254f85b98aea2d56dc043
font_01_sfnt_off0000715c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 10460 bytes
SHA-256: 61f1c2b04bdec32098903b998ffd0992903b4b8f0911239ea8711c3761f9269f
font_02_sfnt_off000094f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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