Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe605cc476b5611…

MALICIOUS

PDF

52.7 KB Created: 2020-10-31 06:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3e8b6b8f074c90c0af14692cda1982d2 SHA-1: d0c4245e300a9a04a6e1a62961d821793a23cdcd SHA-256: dfe605cc476b5611755ce988b618eed2f133442da5188286921487ad109cb262
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/aws?keyword=clinique+acne+solutions+liquid+makeup+review In PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/9477918.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/8260984.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/feeb7128-cc9d-40fe-ab17-7c039d9b2cc7/octuple_compressed_cobblestone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1036a6b-79e9-47f6-8012-a355d73ab235/divoom_voombox_travel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791d2429-1d4f-4d0c-a4a7-5444efd4271b/3595501569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/299ad339-145c-411b-83c5-6d5f0ae7646a/88086708695.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/air_force_ranks_and_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df9d809-d03d-40e8-a359-27e9b84a05fa/26498114544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79395102-0684-463f-b751-81ebfaf93c57/19790058282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbfdc17-3f88-4cd0-b07a-56474806d59a/the_book_of_pook_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e442965d-cdeb-4188-ba3a-832ba8cca665/visitador_medico_computrabajo_urugua.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/zibikofimisukobojazukef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a20ef7-cade-4787-b9e9-69cbc62f73d9/ho_chunk_wisconsin_dells_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a311c398-78b3-4e9a-b264-72aa856be5b3/jamexetola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a549000-d0cf-48ce-a260-fa12eced2835/vusofazokixamunusa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A8 5464 bytes
SHA-256: e675aa9752f205e948d53712b3cca80622cb843eb2696b5e577b51d801af1cbf
font_01_sfnt_off0000792e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792E 2640 bytes
SHA-256: de9ef31c014785fabb5ae5481fa0b38831eae6c8c275f8712cef756f19a9044c
font_02_sfnt_off00008470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8470 12952 bytes
SHA-256: 53add9d60eb500311c83d8aa86d93f742641866fc262a8cbd4a94b5e251bf66e
font_03_sfnt_off0000adb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB3 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06

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