Malicious PDF — malware analysis report

Static analysis result for SHA-256 51666c0ee9279cf6…

MALICIOUS

PDF

45.3 KB Created: 2020-10-16 08:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ef8b4ed06a5d43db817eebea12b8dda5 SHA-1: bf762a06ad385d5e9179e9df677a86608bbb4964 SHA-256: 51666c0ee9279cf66712a3b4d23a21d088e8a2e7fae65efe4c824973f09db9ff
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=fruity+loops+android+free+download In PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/ronufebe-fazabewoxifuli-mitosi-sobonatifa.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/cd88d61b34eca88.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/mukobuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f88c0169c8db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f8735dce7679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8915dec2948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f8775cbd3ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f8753f57b1d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f8929a862f84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f87118f21692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f883db3568a4.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/f4ba8feb-5469-46df-8c0f-d93f72e3d789/15194609704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d0cb8a-d298-40c0-a3af-0145cf898475/kenunokerokikegepaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231f3542-8e36-4bfe-8b8e-9f43056ae604/fikogofedikemud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5392/6558/files/download_pes_apk_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/tiny_titan_water_heater_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/tevatabezidulefavuguvoxeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5889/5254/files/did_you_get_it_spanish_worksheet_answers_unidad_4_leccion_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2541/1481/files/af_form_1003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11490dbd-b451-406f-8105-38bd51efd480/36392256696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b99f3a-d142-47e9-8dd2-24cac1b3137c/lemunogewezatatudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fe4ee4-981d-4973-80bb-fff45fe29968/xitorebotagizasujemiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a30a61-0dc2-4e92-bf85-c7eef25ac2f2/76669563958.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_off00007312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7312 5184 bytes
SHA-256: 61e1709dc9f8d4fa5a3c50bc320c9271873e30010d44275a8cb677df86be636e
font_01_sfnt_off000084e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 10100 bytes
SHA-256: 762a90c32281aa64d1b86dcbabc7d516526b91f7a0ce4276912c255e70af7eaf