Malicious PDF — malware analysis report

Static analysis result for SHA-256 65992c8f19a66ecc…

MALICIOUS

PDF

57.9 KB Created: 2020-10-27 22:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2877dbeeb19539f3f67e2ad522c96a4e SHA-1: c5ec48bf4b928bf58148bdc4bde5312b3df2a45d SHA-256: 65992c8f19a66ecc6e602b55fcd63875b2e4e2bca52f584aaf61063c0f6a7452
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 0.9997

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=liger+zero+panzer+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f93e84d32997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5f8ea2251bdcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8741dc57bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f88299a4f715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f8e2b787d616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f985497458af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5f8e4bd077ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5f97609da5df9.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/1/0495/9571/1651/files/75th_year_anniversary_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4214/6984/files/me_and_bobby_mcgee_ukulele_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2742/9536/files/sesijetefazepufibetoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/registers_of_scotland_registration_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f50f8e-93e2-40a1-aee7-ab26a6c0fcb3/vawazivaroboxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf4f57e-d7c4-4a9d-8b60-e09a0031f083/webavorusepesejotixamixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15be380f-47cb-4874-be7d-12a530a05160/life_of_brian_free_full_movie_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88571589-6924-4823-87df-27bb6b2023fd/49785943949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ebca14-f95d-4810-a5f3-a54b53d8e091/55148955877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e529b8c-e83c-4a96-b42f-6fb072db80aa/latun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5546bb9-2e8d-4fd3-a9b9-a0ea44309bea/xifemezuput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac511ad6-1533-4376-9d10-d52d4ade0510/82324966131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12165c1c-1dc8-4ddb-bf08-1c3d1ff6adae/tofupavitupugule.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/44895991539.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/88818303451.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/nexaki.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/vonuguvasisa.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/auditoria_contbil_fiscal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 4876 bytes
SHA-256: 450f581b5668732a6d288de20d726b1b0b59853531759abe504730fb3200a8e6
font_01_sfnt_off000084d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 4920 bytes
SHA-256: fa3d2813fade5432fa92a0b941523767a0ad39ca7c969baff053ef050271fe7b
font_02_sfnt_off000095c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C8 15196 bytes
SHA-256: b4b1a5b17cea3c69f37e3215bd5b3b61d2b3770e0cbbaadd2e62c0fa687b9c88
font_03_sfnt_off0000c4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BA 16060 bytes
SHA-256: 313c3940a6f4aae92ceaa1b1a843de6e6f13411355a457aba6e018c383fce54c