Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de9a454c95a62b2…

MALICIOUS

PDF

36.5 KB Created: 2020-10-31 15:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 396b73c710a4d190911d1dbead6f087d SHA-1: 9abdf52c87409ec3ac4203640963a465f27c0c3f SHA-256: 3de9a454c95a62b275fa7d57539067492e5e25456acaedaa4926c3198b1ff799
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to malicious sites. The ML classifier also 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://gettraff.ru/strik?keyword=monster+hunter+stories+felyne+quiz+answers In PDF document text
    • https://vabiganivasekeb.weebly.com/uploads/1/3/4/3/134339064/lejexemuziredig-jixana-dokekiba.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/kujeluso-rujuporixotem-puzadabe.pdfIn PDF document text
    • https://narebojabow.weebly.com/uploads/1/3/4/2/134266185/ludebupabeloreda.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/xuwijujorozafudig.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/wixesapu.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/sozusor-gofizulukan-pisobal.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/1/0431/1747/8039/files/mojufejovomisafenunaziko.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/54396913919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0805/0343/files/32006496797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0602/2577/files/drag_racer_v3_unblocked_hacked_top_speed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3533/4070/files/nuvewezogilivape.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/formato_para_rotular_cd_en_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0510/3256/files/67230944454.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_off00004f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F8A 5232 bytes
SHA-256: 914ce414d5eed3f4754dde723b5bccac85acde94d24b4897fca1810764af1513
font_01_sfnt_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 10540 bytes
SHA-256: f51d9795e5d31091ab3b58be7b425ecba23bf8175147dc1c7917960a7a65bc53

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