Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f84694e93a520b8…

MALICIOUS

PDF

56.0 KB Created: 2020-10-30 19:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 77e0a76c869648585b8515d0cd2ac565 SHA-1: d3cdb724a603f4df545d7b7081248bf64e8d75c3 SHA-256: 0f84694e93a520b8b7f51271d1ff610e3794e5df9a543f5793e18cb0181aa7e3
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.link/123?keyword=match+these+terms+with+their+descriptions+slavery In PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/dibiferoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f875ebb5ede2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5f9bf59391fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f871cc8c3df1.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/memul/sc_st_act_amendment_2015_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/janamofaxebujuvigofuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/pusumowi/clasificacion_de_los_diodos_semiconductores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0510/2705/0661/files/9930991063.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/gikupemezisemudufakevoje.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_off00009e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E04 5572 bytes
SHA-256: 32ccc43ec3fc0e5c91df572545e55c53948bb2209023eb8784605d93a962bc9f
font_01_sfnt_off0000b0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EE 10108 bytes
SHA-256: 035b8d876c7c01d468979ae57cdf13e48a81fcefc6d7d80c8ed7b15a4d43f926