Malicious PDF — malware analysis report

Static analysis result for SHA-256 0598bdd7a044daa6…

MALICIOUS

PDF

56.4 KB Created: 2020-10-19 19:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 72567ab1ed866d350ef4e8d715bd4883 SHA-1: db71b0b33982d865d79a724b848b1f12544a0354 SHA-256: 0598bdd7a044daa680785e4dd92e316e13b2bbd43794faccbf0de20d54f6070b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?keyword=1st+order+low+pass+butterworth+filter+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f8d80596bd7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f895f29d8374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f87687d36c41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f875b022a809.pdfIn PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/manales.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/3d029.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/bokamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8b2272aaf0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f8712547b003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f8d896750c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f874ebd56c48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f8c7c99ca309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8bcd2c2e807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f87b92958a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f88684ae738a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f8c9e07d89ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8935adb62ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f8cb60fe587e.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/1/0497/0659/8557/files/59723928446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/hitachi_c10fr_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8529/2223/files/bezesube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0259/2935/files/jibeb.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 5320 bytes
SHA-256: 6a7de21d09d6f55f717c20c0525e46a2ef20714b0a7d0c48e01211aaae3b50b3
font_01_sfnt_off000099f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F8 10508 bytes
SHA-256: 797cd4430dac04a76054deca8b9e7c5b0418041f2a933891970444ea578702a4
font_02_sfnt_off0000be30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE30 16164 bytes
SHA-256: 9b6290daff9a6bba22832061376e746a124a4fa08f3c030fb9c529997d27247e

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