Malicious PDF — malware analysis report

Static analysis result for SHA-256 014933b9fc925ff4…

MALICIOUS

PDF

49.3 KB Created: 2020-10-05 00:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 28310cd44b325b1cafbee87ef27a501e SHA-1: e013be5ba6b8162ccc63fe553af4eb237aabcd0a SHA-256: 014933b9fc925ff4210b8bfbb068051665f0366e3bc827176f372e0dbc2bc98f
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a malicious redirector domain, disguised as a search result for "foundations of web design pdf". The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO poisoning attempt. No scripts were extracted, but the primary malicious functionality appears to be redirecting users to a harmful site.

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/strik?keyword=foundations+of+web+design+pdf In PDF document text
    • http://files.yamw.org/uploads/1/3/1/8/131857445/memanodononejo_kojenuxibonis_biwikilefaduwo_xeteru.pdfIn PDF document text
    • http://files.ghecca.com/uploads/1/3/2/7/132710779/0c3656.pdfIn PDF document text
    • http://megup.bethgatesglass.com/uploads/1/3/2/6/132681763/xonubuk-xuxowobak-meselilunupike-tuduzujevebewaz.pdfIn PDF document text
    • http://files.geoffrebbeck.com/uploads/1/3/0/7/130739616/nuvedukuxa.pdfIn PDF document text
    • http://files.introductiontheband.com/uploads/1/3/1/4/131452903/6622906.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/1/0481/6787/8807/files/berthoud_high_school_softball_tournament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1274/3080/files/ge_simon_xt_programming_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/donald_ray_pollock_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5919/9650/files/cole_haan_return_policy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9323/0498/files/new_volibear_jungle_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/sitodiwuvewifukawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9878/3902/files/danskin_now_shorts_with_pockets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9884/9438/files/71577897439.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_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 5268 bytes
SHA-256: f0bd68dfe40b64dbd745f52ae57f090278bc81316c66b15f8f9caa1fd0d69d2b
font_01_sfnt_off00009389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9389 10764 bytes
SHA-256: a1fe9de56a83b0426ae102ae66e5960a8523784981e1d20d3f2b4e8eb3d3f93a

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