Malicious PDF — malware analysis report

Static analysis result for SHA-256 548790a6a93f95fe…

MALICIOUS

PDF

44.7 KB Created: 2020-11-02 03:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3e76e92d21645be204d2a78f315d8a3d SHA-1: de5b197ff4b8f3bacda9bc4a88574d9e4a592e96 SHA-256: 548790a6a93f95fe80dd5cf7eee3cf3675d144f750874c27526743bf58d4f62d
154 Risk Score

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=movies+application+download In PDF document text
    • https://bimidupixujeg.weebly.com/uploads/1/3/4/3/134319160/5316941.pdfIn PDF document text
    • https://jazaxalik.weebly.com/uploads/1/3/4/4/134488577/3da0a2.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/c7e86e3186ab312.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/7153357.pdfIn PDF document text
    • https://dubuzimonovox.weebly.com/uploads/1/3/4/3/134347386/9cdc89574b07.pdfIn PDF document text
    • https://xabomipa.weebly.com/uploads/1/3/4/4/134484571/bikavik.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://cdn.shopify.com/s/files/1/0436/2846/2240/files/6222573911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4978/5765/files/md513ll_a_ipad_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/jupipavule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7059/5487/files/bofuxide.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/1998_honda_shadow_750_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/noes_de_administrao_publica_para_concursos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3138/6041/files/xubalovetesakewevuzefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8696/8480/files/85948753427.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/38436873030.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_off00006329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 4916 bytes
SHA-256: 7a7cff385719fc1b682086b7edb212b62cd9642ed5174f2d996c4353bcc9fd5a
font_01_sfnt_off00007409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7409 10384 bytes
SHA-256: 3c0cb61e198fdf4d65210b814f5dfe239cf6745c58ad7a277416e5debfc490b8
font_02_sfnt_off000097a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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