Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8be464d0a74743…

MALICIOUS

PDF

42.3 KB Created: 2020-11-03 00:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4556c5fb7512e036d1da4f47bcdadc7c SHA-1: 2a43a5640d516ffe2ded6b858907a8ca5351eda2 SHA-256: de8be464d0a74743aa818946f1ef75f200872bafd2167aa0b75322e99752e5ae
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The 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 URL identified is 'https://gettraff.ru/strik?keyword=unblocked+games+the+new+method+run+2', which is likely used to redirect users to further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://gettraff.ru/strik?keyword=unblocked+games+the+new+method+run+2 In PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/6915380.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/6ea8b0.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zuwozezekixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f904b4ad51b0.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/pizusiwirosis-gurif-lanaxuwiburug-nuzojopojopode.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/depujelolunira_jutuzineb_piweb_bepewalaxu.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/1/0495/9843/1396/files/nordic_lodge_rhode_island_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6644/8808/files/edhelper_vocabulary_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/5559938908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2435/0375/files/mirrors_edge_2d_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7603/3943/files/google_assistant_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2737/2481/files/21162258179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9034/3584/files/family_budget_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2412/4573/files/distributed_multimedia_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/vepugenopakuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8676/9053/files/catacomb_of_priscilla.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_off00006531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 5772 bytes
SHA-256: 4581f68bcb181cb94de0dc2e8e4d5c0e7a7b94fc0d4a6cba8b9dddcab3b0f2a7
font_01_sfnt_off000078be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BE 10528 bytes
SHA-256: 4506c26d40590bd00f0f6994742a1e5e8cc7c0da48957f5d7ed8187dc2fc6c3f

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