Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6e551e3c783ca9…

MALICIOUS

PDF

52.1 KB Created: 2020-10-29 02:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 75f9fb7d0db34df5777f4a42ebace968 SHA-1: e104dcf68c6d8ea6bb945a3d1a3e3cc0e02671e0 SHA-256: 1f6e551e3c783ca922a2fb9fdece2d1e8e02220bd87f557d384c36b5e692c269
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDF files, but one critical link points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Dungeons and Dragons character sheet pdf download' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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://ttraff.link/pify?keyword=dungeons+and+dragons+3.5+character+sheet+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f8da5a7c375b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f904207c9b07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f8f633f85549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f898718dcc9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f888f9f60e59.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/721a7730-8afd-49ec-9211-ef0aae535c61/mesewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e866c0-a1d3-4552-989b-c0c375eb54ec/masse_volumique_terre_vgtale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ee7599-2f09-4068-8248-a0d65e39fddb/laxemepituk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/omicron_upsilon_kappa_alpha_psi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/free_tabe_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd56a0cf-904f-4148-a292-5f8c1809b48a/tipos_de_empaque_y_embalaje_para_exportacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/velelekez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b918ee6d-33cc-4311-a855-f130eae356f0/67075929370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7985a0b-4170-4a4e-8fb5-a757e742f792/tegejor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff606228-c4da-4b2d-af5f-95de59393e99/jonufede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886eb15a-b69a-4195-9840-2cab94e5ac39/8508067199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db89b85c-5664-4b3e-a598-ceaedf3bf041/bosch_brute_jackhammer_handle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ca4ce8-c217-4e21-a550-7b4d8f75e194/kegugasunavoduwor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41183aa1-d0fc-4eaa-91be-a697ea55fcbd/pokemon_dv_calculator_gen_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48ab60d-811a-43ab-a1a7-d30b539ccb80/80563745066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6231/1095/files/the_marketing_plan_handbook_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3076/4446/files/garden_of_life_b_complex_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9344/0697/files/mepisulujar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6b82cd-1011-49d5-90ef-2ea39d28f158/76489445711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6591/4555/files/ketudemanixirebebov.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_off00008827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8827 5828 bytes
SHA-256: 0ccefbd94eb030ac927273098a11f0a48e2a5f9a94f4e3cd0ec8c65ee9af9c7e
font_01_sfnt_off00009c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1D 11668 bytes
SHA-256: dc775c65ebf84bf59d5eeeae52f73ca05d049d75491f531cb1a882e6dcb662b5