Malicious PDF — malware analysis report

Static analysis result for SHA-256 16eaadeed4c72579…

MALICIOUS

PDF

49.8 KB Created: 2020-10-28 12:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 469abf428a50cfeede984780975530e8 SHA-1: 0468849528b93bd9ae16fda24538e7c9c08e7cd5 SHA-256: 16eaadeed4c72579c4b83c71f9b1e5fbdf3f37527694eff258c139e39346e25d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector to malicious infrastructure, disguised with a lure of 'baseball trivia questions and answers 2015'. The ML classifier strongly indicated maliciousness. The document body itself is heavily obfuscated but contains the malicious URL, suggesting the primary purpose is to redirect users to potentially harmful content.

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=baseball+trivia+questions+and+answers+2015 In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/dfdff8b9cdd9c.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/gafajifinime-lavodefikav-dilutitibol-nogunajizanug.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/mokabipago-supuneponezoru-romuwezi-jufeso.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/9acbf4a0ef015.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/1154415.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/bdfa22f.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/6e709fdda73c.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.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/1/0499/2381/7640/files/nonemazidarapefewej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661114de-fab2-4ee8-84a1-318c391b49b6/libro_misbehaving_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d558312a-1ce8-4486-a3db-7b00932e4480/jijikazite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5764/2152/files/98908042577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9256/8983/files/android_studio_flutter_plugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4366/0186/files/sebavijabim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3080/5149/files/critical_ops_game_apk_obb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8797/6864/files/migobobipulevizowijavital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e810df-bfb6-4222-984f-2da51cea6613/34391990786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085d0abf-22cd-4665-a38c-524fc551878f/mukozinawotivuzaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07edce6-7939-44af-842e-e11f52f07082/sigidebexenawujijezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1241/3847/files/jonathan_burrows_choreographers_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4114/7038/files/16486761162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0febdcb6-ac2e-4a66-bda3-81a7b8c05e14/4721413871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c784717a-bef8-4c89-a248-b6878270424a/gepesuxukazovopeporine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f336f1-be42-4c47-9a4d-a594f00b3d10/how_to_save_a_visio_file_as_a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2032/9375/files/32881901071.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_off000080c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 5736 bytes
SHA-256: d269a62b7b40cb12b95211541562b5e680f1861eccb19462647fbee02c6bf350
font_01_sfnt_off00009476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9476 10664 bytes
SHA-256: 833c2dae57e89973bdc79ea7489af60cb42f15b30447913226b3461f1abcc58f