Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34cfc2750d3802e…

MALICIOUS

PDF

43.7 KB Created: 2020-10-29 12:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ffbc8bc3f20068043114a8d5d6987252 SHA-1: 3d1035915661b6b65bc856bdbce7c90d9ab29fb7 SHA-256: d34cfc2750d3802ee9e15734a271bdebd1fab992e341e10f7014add8700b3efe
184 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised with a keyword related to selling eggs. The document also functions as a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=himalayan+monal+pheasant+eggs+for+sale In PDF document text
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/fijevetew-zewulekasan.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/9008238.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/5509648.pdfIn PDF document text
    • https://tenaxujapem.weebly.com/uploads/1/3/4/3/134341928/f1714850a44e.pdfIn PDF document text
    • https://palifeselaliku.weebly.com/uploads/1/3/4/4/134441248/2803592.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/202a75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/objective_zoology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5390/7605/files/23353974917.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/aeration_wastewater_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8ceac8-2830-4f7f-894f-b27cbd8bc717/night_changes_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/riwayat_alamiah_penyakit_cacar_air.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6595712e-1ff3-46b0-827a-5d7f07c99510/kisufeneguwovupigib.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/pigigaxinerojew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af58a62-e6a6-4309-9ff2-037207ff56a5/dumujava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2356/7512/files/tuzuvebanavafolelofo.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bijafavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1255/1353/files/zezowovefoxujode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1a0825-9a7b-4553-98bf-22346ae8ef6d/66415215985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25f3a3f-f912-465c-b222-d647ba9f39b9/zuxetuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7133/9194/files/ximizizezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4903/3114/files/69741859965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed76e5e1-5c10-4818-99c1-a74bcffcf38f/ritufep.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_off00006c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C64 5380 bytes
SHA-256: fd4b353376b5309f2fada4f5bc29085ab337deb417926f0024c2e7a6904a04cd
font_01_sfnt_off00007e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 10340 bytes
SHA-256: 7f709a51a60353546ec9843d5762f7e3819abe7ac178147467936d87f4fa2474