Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67f6130fe3509cf…

MALICIOUS

PDF

34.7 KB Created: 2020-11-01 05:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff2a9ae56b8a3ac6ec2a771cd0397f4e SHA-1: 79bab866d56c497a2698d6682ff0e976450661a8 SHA-256: e67f6130fe3509cfd4ed74fb6ab84377590c6e7b5a9ac2a808bb6deb08b6d47f
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a 'Hayward h series manual'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this malicious redirection. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to benign-looking PDFs, likely to obscure the malicious link. No scripts were extracted, but the embedded URL itself is the primary indicator of 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/123?keyword=hayward+h+series+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f8b1e9c6e0ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f91496c9c36a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_5f9a8e8f0d320.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/bomag_bt65.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/66997612124.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/autocad_3d_tutorial_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6867/6038/files/92413466611.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/xiradox.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/42663832268.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/zones_migration_in_solaris_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/wodosip.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/apartment_guide_tyler_tx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8086/8522/files/dokefipofemujifim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6913/9863/files/disney_princess_my_fairytale_adventure.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_off00004209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4209 4912 bytes
SHA-256: df76e1a397f0e4ffd15c1b9854b07056eefddedc788766f5f75952432601e693
font_01_sfnt_off0000528b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x528B 8668 bytes
SHA-256: 7799c28b2b575d7cba2223202964e41c746464768021991105877987cdfc0e70
font_02_sfnt_off00006ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF5 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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