Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d116a9988dd17ce…

MALICIOUS

PDF

50.3 KB Created: 2020-10-29 01:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9c1120b43310c85c17d4ce00a40ec8e6 SHA-1: bf9955c61888b323b476b6e03a21c5d89c16ed6e SHA-256: 6d116a9988dd17ce80a345f65a6d171427959252063969a51f9239980c93ad87
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector infrastructure known for malicious activity. The document body and embedded links suggest a lure for users to download seemingly legitimate files, such as calendars or worksheets, which instead lead to malicious sites. While no scripts were directly extracted, the PDF structure and link farm heuristic indicate a malicious intent to redirect users to harmful content.

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://ggtraff.ru/wb?keyword=fillable%20pdf%20calendar%20september%202018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f88ad847a144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f9941ece5f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f89d2cdea92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f97802a4b8b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f92d77b735aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f93b01008f28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8b4051163d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f971e2219873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f89eeeb49a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_5f98cd3dbe914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414352/normal_5f98ace0b9222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f8d24bc7d9b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5f98e4cd9004a.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/rujabepifar/tithi_toran_gujarati_calendar_2016_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8902/5942/files/87149733023.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/14104337306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3733/3925/files/cpt_cognitive_processing_therapy_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/262598dd-5634-4b6c-afe0-3dae8c7cd5e8/toshiba_55_inch_tv_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd6e6e2-6ce1-4c68-b9da-70e7c770a286/purasodinafitunowikidob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390c1659-e40e-4a6d-bba3-b7ea2154c363/2461577237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6153/7689/files/87602775532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb01032-235b-49a3-9fb8-759528390358/21553568483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/zamofebi.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/makutevi.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/10335848566.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_off00008377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8377 5916 bytes
SHA-256: 30e0cdcb5d4cfd0710b7af61cd4f537a3fc30ae89f21b156f8d9673c48fe83cb
font_01_sfnt_off00009786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9786 10924 bytes
SHA-256: 0ec0e6ae111bc7243ef2ae1021a2fcc4339d137c374dbd85e48c929553213679

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