Malicious PDF — malware analysis report

Static analysis result for SHA-256 45230fa293a0a168…

MALICIOUS

PDF

55.7 KB Created: 2020-10-26 06:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 317e541b2c0237db99de6c489da1dfc0 SHA-1: 9f969af0751cea857c3a40c8373121cf74d115de SHA-256: 45230fa293a0a1684a98076214f8f45d488f0920dc8914474a16963dbf0bc5d9
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, forming a link farm, with a critical heuristic identifying a redirector link to 'https://ggtraff.ru/strik?keyword=baldoria+on+the+water'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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://ggtraff.ru/strik?keyword=baldoria+on+the+water
    • https://purowuma.weebly.com/uploads/1/3/4/4/134472698/3178909.pdf
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/db85d.pdf
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdf
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/zesidoselebitobe.pdf
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5f928b692a608.pdf
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f94419d1bc65.pdf
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f8ea054c283e.pdf
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5f928262610b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a75608ff-971a-4b50-a66e-facec83673e9/63231371457.pdf
    • https://uploads.strikinglycdn.com/files/6738b81e-6179-4975-be6c-cda0411e25a4/35878199939.pdf
    • https://uploads.strikinglycdn.com/files/28992ebe-ddfa-484a-91b6-e845f15f649a/22169495525.pdf
    • https://uploads.strikinglycdn.com/files/7412d8f4-1cb3-4efe-8355-0d1eebae480d/fenidizulixelaxaf.pdf
    • https://uploads.strikinglycdn.com/files/b7eab061-6492-45f8-a637-6e63e5997168/70310612143.pdf
    • https://uploads.strikinglycdn.com/files/91121018-2c34-4f1e-95df-883938bb93ac/27175612345.pdf
    • https://uploads.strikinglycdn.com/files/1da04780-689c-4054-a3e3-449afbacef00/limp_bizkit_stampede_of_the_disco_elephants_tracklist.pdf
    • https://uploads.strikinglycdn.com/files/9982d93e-9606-4c5e-b03c-12228424af7a/mevenigok.pdf
    • https://uploads.strikinglycdn.com/files/d4c34435-7e54-4ba4-b9b6-088df76244f8/18811118689.pdf
    • https://uploads.strikinglycdn.com/files/5b5b78e4-8e00-4ee5-8fb7-3218046d33bb/58966457373.pdf
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/vupulezoxenigomavet.pdf
    • https://cdn.shopify.com/s/files/1/0505/5941/8553/files/pojapij.pdf
    • https://cdn.shopify.com/s/files/1/0504/2546/2971/files/corporate_security_policy.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/26678642880.pdf
    • https://cdn.shopify.com/s/files/1/0504/5344/6835/files/64064713974.pdf
    • https://cdn.shopify.com/s/files/1/0436/2990/4032/files/ferijubumefamegizawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/11033203236.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b73.bin
540cac641764a0d7150e22b84bf52c75fdc359eb836cab7bbf5158c2c0e3ea69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B73 4876 bytes
font_01_sfnt_off0000ac0e.bin
1a954abbbda00e87ea9e4f7020246900eeb1ffc117934ff5fb22848383349e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0E 10876 bytes

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