Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c46353fae87d2cf…

MALICIOUS

PDF

45.8 KB Created: 2020-10-29 20:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 135bf426176c2c2f730f5fa5bb876ee1 SHA-1: e8c04cad56058d5220c7b6105c5b7fd3a2a9335f SHA-256: 5c46353fae87d2cff5d37424061467c1cf3df166c8fe08fd055ca7ec057b27f7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'gettraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are likely part of a SEO spam campaign. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://gettraff.ru/123?keyword=dometic+refrigerator+parts+manual' is the primary IOC, suggesting a phishing or redirection attempt.

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 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/123?keyword=dometic+refrigerator+parts+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f8849bea27d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f8b846998f5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f88a7c3a5af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f916268ac7f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f8f3803a25a6.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/wepoxigixakixafido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f87343e91cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f8f4ea69272c.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/1/0266/9445/1387/files/15902289692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9538/3960/files/81428558518.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/ibps_rrb_notification_2019_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/oscar_wilde_salome_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/abzurdah_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/it_ain_t_my_fault_line_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/libro_cardiologia_guadalajara_gratis.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_off0000736d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 5332 bytes
SHA-256: 363d216e9512508c7e8db81efdbd739e5fee022f2d5ec072cf93202a473482b4
font_01_sfnt_off00008586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8586 10596 bytes
SHA-256: e54710177798bd47cd1e6bfda61a8f4fe30417bb1a08b1af6be00f6ee500fdd6

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