Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f405325f640a41…

MALICIOUS

PDF

45.4 KB Created: 2020-11-02 05:31:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4a0b5b1cff5d70c3f8870d39bd636aee SHA-1: b96bed8fcb16b44ac82c80e4350a6e692f49ad1e SHA-256: d2f405325f640a41fa20d3af427b0b2bd3a52374b42e20f35e53ed586d091f8a
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to appear as a search result for a 'dyson am09 user manual'. The document body, though heavily obfuscated, contains similar URLs and text suggesting a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=dyson+am09+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f887d2e7519e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f97229906985.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/4788281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/83656593138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/9135796892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7992/3365/files/79470842496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8138/2046/files/dark_shadows_episode_guide_1967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7752/6186/files/reduce_foxit_reader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7808/2495/files/buzigovesejigizegemunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4454/7991/files/97177694934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0699/2289/files/gloud_games_apk_hack_version_download.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_off00007359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 5232 bytes
SHA-256: 1debb6ac2d0a77748d221d732c9fda0dc613b9a7e6037ab623849d97fc5a32eb
font_01_sfnt_off0000850e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850E 10588 bytes
SHA-256: a99e9e57164793e01387a744137f3587aeda0edb8a681924b5ce6fa0c84f1a5d

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