Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e00fb727f3a21d…

MALICIOUS

PDF

50.1 KB Created: 2020-10-31 11:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6dc609f471030074ecdb2ddb4a0a9331 SHA-1: 1e029b7cc4b03465ce609bd0bf0228d6e04c5e1a SHA-256: 78e00fb727f3a21d0d7d018e14316cebbe9c1d48bd1ca1f3948bcbdf43c597f5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document body contains numerous embedded URLs, suggesting a link farm designed to redirect users to potentially harmful sites. The primary malicious URL identified is https://ggtraff.ru/strik?keyword=basc+uc+davis.

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/strik?keyword=basc+uc+davis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f9841c9f0bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f893698ddb35.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/toximerap_lepeni_nokazuzejajevod_mavexuravok.pdfIn PDF document text
    • https://paseboke.weebly.com/uploads/1/3/4/4/134432883/somalesaxuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5f8d3d27eb787.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/badefuromaguxupadipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8a8608e421b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2d7ee4-c45e-43f1-8442-d8ce7842a673/lawelodupemevifiladotefud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5368/4126/files/pagulax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5867/1015/files/89210610080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/wuvuxifimowefur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9be1ad-9e48-4c05-b65e-b6047c14df38/tewetevezewofemot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3a876e-5ab3-41e9-9535-ca9f7b6f6bd8/16646784517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab26c8b-3d35-415a-8665-9c1cc7184ad9/supubawur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f453ce4-e46b-4d56-a941-92e186f9f1d4/junikipi.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_off0000873f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 4912 bytes
SHA-256: 4a9a7989e2bc7f7e0457ede7d0aa391edd85b63b8d2ff66b718aa5b332cf6ce2
font_01_sfnt_off0000980f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x980F 10664 bytes
SHA-256: eee400ded5f434845baf722a00951ac7cf1b2df7a1d2bb861f9d19e8be21e542

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