Malicious PDF — malware analysis report

Static analysis result for SHA-256 95863b3d349760ee…

MALICIOUS

PDF

97.0 KB Created: 2020-10-29 12:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 79f193126f03829c85f4315177d7810e SHA-1: 17e6852908dee71b221531803fd2ecbcb6b6f1b1 SHA-256: 95863b3d349760eef94c1a1da88e39b5517d1054a3f8fbad72ad449f98ee029c
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 0.9999

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://ttraff.cc/pify?keyword=modern+bookbinding+methods In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f99b1b025b61.pdfIn PDF document text
    • https://davobudo.weebly.com/uploads/1/3/4/4/134432622/5305151.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/4bd5d9910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f987e1a2b879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410216/normal_5f93a76833137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f8d0075bfdbf.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/5893f450c.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/d0fb05bd833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f8f96977100f.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/1/0501/9687/3399/files/apkparadise_gta_liberty_city.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/ozymandias_question_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/23982274430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7836/7415/files/62392982457.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/columbia_st_marys_milwaukee_medical_records.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1216/1175/files/the_untethered_soul_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6929/9101/files/52134463103.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/jezivifux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2511/9422/files/81735971869.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/urbanismo_tactico_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/logifipivifaxokufuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/94941074121.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC0 3872 bytes
SHA-256: 708bd4634f07cc358515b1263811120d81cc6849a9c3cd1877b37c45bd35be1f
font_01_sfnt_off00011896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11896 5208 bytes
SHA-256: 59bdc5b9579828ecf57bae825d6803fee0f0d29661cd65902b2c7ea12cf43051
font_02_sfnt_off00012a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A31 11772 bytes
SHA-256: 020a7abc64c5ab673700c75d40a6d8da83735a9c8a8f4f61080dfc8d087b1e0f
font_03_sfnt_off00015218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15218 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_04_sfnt_off0001667f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1667F 6084 bytes
SHA-256: 0c3766dce408445f50e904d652c9326647873efe4fb22fffa238fb744f3c79a9