Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f30367eca61088…

MALICIOUS

PDF

41.9 KB Created: 2020-11-03 01:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 611aa74bb2ab389656c373a6b54da09a SHA-1: ddbf4e8408d3b6bf5fcaa1f39381076a537ec18b SHA-256: 02f30367eca61088f401e6f6a148ac88e59bc7dc05897ec51421f60777da089d
124 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 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 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://gettraff.ru/strik?keyword=python+crash+course+book+pdf+download In PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/9f8a2.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/bfe2abb6.pdfIn PDF document text
    • https://bufasadapigeze.weebly.com/uploads/1/3/4/3/134307931/wapisesutize.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/4f618a44b40.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/210d7.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/tatode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/78898b36-aec8-46f7-b4f1-f0ee5e3e05ec/46419424521.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/28773356237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574ca122-eb83-4c44-929a-8142d56b811e/75673222676.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/tableau_tutorial_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c46b3098-3df2-4145-acb0-bed8f49ef043/62667820604.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/android_studio_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5adcb0-53fb-472b-99e6-4def4c4b790f/najijakojojo.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/blueprint_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e966c9e8-12bb-42f2-a6c6-090c695f8aaf/8901250505.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/kakuputabuxoronofe.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_off0000633c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 5640 bytes
SHA-256: 49833a845e8df9cd988c56938b996789a35915b4c44af209c9be069fbf9490c5
font_01_sfnt_off0000767d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 10588 bytes
SHA-256: 8d8bc98b741127c4ce1691bdbd86ce5529ae85da5a619924307225c778d7ad89