Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e21d64ae7bbe9db…

MALICIOUS

PDF

44.0 KB Created: 2020-10-27 20:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 160359c7924c2c76a223c64e2bdee6a8 SHA-1: b04a988a9363027701b577e5812df42d9408dd10 SHA-256: 5e21d64ae7bbe9db1e2f266d68b9defc4eb37b6d4775790bc3f519988a5e5a17
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to obscure malicious activity or distribute content. The presence of a link to a redirector and the high ML classifier score strongly suggest malicious intent, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=innova+3100+factory+reset In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5f94311b87295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86fc7b0ec9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f88a9afbcbd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f9296ed00e4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f9448d1a8591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f89fb4e7b387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f8f91975880b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5f9089b6e5ff3.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/1/0499/1696/9149/files/automatic_call_recorder_pro_apk_hidden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5296/4266/files/corolla_xei_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7850/8440/files/jewonukutanav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e74c1ee-967e-4688-8b9d-9220a8b94690/takukirarej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/510a9bc9-a7c2-4182-acac-1a9b4dee097b/lazatewaxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd4f0ce-d188-45a3-8e87-d71e9d4e7e6f/for_honor_how_to_feint_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8703b0-d18d-4f02-b2e7-a755b85304c3/28052966486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42277e85-9176-43dc-bc76-8b8100a86719/vubonokoruwipawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f489e0dc-21e6-49f9-97b3-8faa8de8a9aa/guzofijewedukadifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/boxojokemopij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/king_soopers_castle_rock_bakery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8546/6267/files/warframe_mastery_rank_test_28.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6714/1017/files/handbook_of_mathematics_vialar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/15738903205.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_off00006dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 5300 bytes
SHA-256: c7a088408e2e99a306f8c4ba3cf9af6764428a81cf82e9799416975d644609d0
font_01_sfnt_off00007ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 10200 bytes
SHA-256: 1f212531f5451fcd0e8d4abf407fe5caeda53fec78ffca8d8f7d56986e0ec8b1

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