Malicious PDF — malware analysis report

Static analysis result for SHA-256 68934415e4fcfc90…

MALICIOUS

PDF

45.8 KB Created: 2020-10-30 14:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8ddf8d49f4235bc6d234c7ef4feeb109 SHA-1: 1e0426818318ff97551f734abbd412ed358359df SHA-256: 68934415e4fcfc90b3af7a6ad878bafae1c12b5cd583d3e4aff045f54bf9686d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text and URLs that suggest a lure for free PDF downloads, likely to redirect users to malicious content or phishing sites. The ML classifier strongly indicated maliciousness.

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://ggtraff.ru/pify?keyword=the+tao+of+badass+pdf+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f875e938b8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f8ef1f55d3bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5f9942c6d87b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_5f96b81c30d38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5f8eb69c27d93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8e32e76487a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f94a5cd39865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_5f93083a2a75b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/52223a51-b604-44b4-b430-16b5586a7ed8/33715147908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0697/4909/files/88023534947.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/16742886278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4515/7529/files/39777471487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9397954c-0a20-461d-bff9-ad000ec5e27b/tbbp_skyrim_mod.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_off00006933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 3156 bytes
SHA-256: 2c035a5b651ac408165eb80c2bcfca616666f67193aa257ae7fba5ccbe3a5623
font_01_sfnt_off00007475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 5216 bytes
SHA-256: 7eb6afc4d221f53ddc11e15eaf09731486735373575ceae1425ecde62a7a938f
font_02_sfnt_off00008622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8622 10868 bytes
SHA-256: df3e704f29ef962587877eae30c2b560b26a9d05834cc8f0334259c8a1685328

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