Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d0ba4f971ff01d…

MALICIOUS

PDF

48.8 KB Created: 2020-10-16 13:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e97b0ce1c81c4e41aaaecdca96e00093 SHA-1: 696882ac8b61f4ad807fdb1c2ec3e71861d2f838 SHA-256: f5d0ba4f971ff01d3a3a712087fd65d4f8918fade001f215e109d29775008fe4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the PDF is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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/pify?keyword=writing+styles+and+techniques+pdf In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/movew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f88ec007945c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f871ba65d148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f897cc74f979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f87110d8cde3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8770709629e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8813cde10ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f895cee1bd5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f87b94fbbc19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f87b501e0da3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f88b392caafb.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/1/0496/8028/5848/files/talleres_para_matrimonios_cristianos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8626/5498/files/acing_business_associations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4635/5103/files/95408405008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7253/5707/files/71634312847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8791/3653/files/examen_tipo_toefl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/32517096622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3669/6995/files/family_guy_color_chart_gif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0265/9491/files/47138776178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/offline_civilization_games_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0193/2706/files/20383190378.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_off00007f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F20 5660 bytes
SHA-256: e099ac7641733cbbb29ec300ae8271f0bdccf54dc9a4f37bfe44b2788efd5c0a
font_01_sfnt_off0000926a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926A 10380 bytes
SHA-256: e1a35977bdbb88fc41e793c70db8f4f693101b4b3f5ceb55eb1bfbe74d7182ec

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