Malicious PDF — malware analysis report

Static analysis result for SHA-256 715266f7e773d604…

MALICIOUS

PDF

39.0 KB Created: 2020-10-28 18:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 67b11a4a8642c2fcde5e5cd41b10fbe1 SHA-1: ec4c800bc2147f273e4e0d40ca41f3b9b9fc5812 SHA-256: 715266f7e773d60431d7ef41b8605b365727e773a56f5b1daeaf0c617972827f
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed for SEO manipulation. The primary malicious link identified is https://cctraff.ru/strik?keyword=pacing+guide+template+google+docs, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious sites.

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=pacing+guide+template+google+docs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5f968d48a3beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f8bdfc60e8e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_5f97df5330796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f953ed6ef2c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f91d0b30c859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_5f9802c9ce432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f89bfc7f1a0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_5f97e49645616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8716a9998f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f890827714aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f8de5821d6e8.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/1/0502/4966/2632/files/jurnal_pph_pasal_26.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0921/2068/files/most_advanced_android_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/99892909462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3936/2719/files/max_tow_gauges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0312/9252/files/essentials_of_accounting_for_governmental_and_not-for-profit_organizations_14th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/kasanokiminutori.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/uniaxial_crystals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/kompres_file_jadi_300_kb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/craftsman_drill_model_315_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/fofevubefozavorut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9250/2437/files/xemaxixakabemuvusa.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_off0000524d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x524D 5300 bytes
SHA-256: a3c9a6a13789ed8b34b7284b697e73ece163eeac672a8aec6d1af45bd8e6543e
font_01_sfnt_off00006443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 12624 bytes
SHA-256: eea3c1541d0ac8420e315533a4b72544e7d6eed6a5a2d1bf9ed357c649bdca26

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