Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd7986e69695fdb…

MALICIOUS

PDF

50.7 KB Created: 2020-10-28 09:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6c968b0242965de7976298ac35cf7a21 SHA-1: ed4884fdd5017d078c3e70e584220fa00587a14a SHA-256: 7dd7986e69695fdb0052dcfc01d1e72005e88dea1bad6ba87f6b1e9e2007409d
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 large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO manipulation tactic. One of the primary links, https://gettraff.ru/strik?keyword=door+window+curtains+walmart, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious infrastructure, likely as part of a phishing or scam campaign.

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/strik?keyword=door+window+curtains+walmart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f90660233457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_5f98a2da848a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_5f9263c329e8d.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/1/0486/2423/8757/files/69181220508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8805/8784/files/pasinilaribikebilaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9845/4693/files/grade_2_english_worksheets_sri_lanka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be23d320-e126-454d-8510-1ca467695451/73589111513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21fbb329-aabe-48ba-81b7-a930829d3a99/lopoxenaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbba8cd4-e42d-432e-ab88-377813d5642b/62589266258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f6f628-1a5b-4186-b13b-96123c6b658e/fulinalidebefuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3aec140-7c6d-432c-bbfe-6b340c4ebf06/86333130784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a263da1-20fd-4ef9-a70f-ed173e54483f/13969253136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15608bc4-55de-40e8-b0df-3e614d4f5200/93605829681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee26b4b2-2914-4679-aa72-310015371bc7/veduladonirinetevafume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16dff75a-ad52-469b-825d-f9a2dcd45cb9/waxapunotufebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5e76b2-cdb6-4917-903b-7198834c2441/48645265720.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/ata_2200_chapters.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/21876554528.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/padekotomitu.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/apprenticed_to_a_himalayan_master_a_yogi_s_autobiography_free.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/building_construction_book_by_mckay.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_off000088fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FC 5176 bytes
SHA-256: 0294e4fea794e7e15c66357cc4d8db7439f34512123d9f29047f9732703efae2
font_01_sfnt_off00009a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8A 10300 bytes
SHA-256: 24d0a60c71dd1754fbd44279c388d2d72aba580df63b95970fa2df1219fa9621

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