Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa51855346800e7a…

MALICIOUS

PDF

46.4 KB Created: 2020-10-16 01:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 44fa8dd89aa7d43ed081a659bccce5fd SHA-1: 6d8d860f21710431f2981b76f26a2e525676390e SHA-256: fa51855346800e7a9f58ef0ac69e8f7eec10c3d5e72a1c61c85b5d1b7ff499de
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://gettraff.ru/strik?keyword=abc+dalf+c1+c2+corrig%25C3%25A9+pdf In PDF document text
    • https://site-1039995.mozfiles.com/files/1039995/46798377924.pdfIn PDF document text
    • https://site-1044020.mozfiles.com/files/1044020/24602591230.pdfIn PDF document text
    • https://site-1041074.mozfiles.com/files/1041074/93987373913.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/zobekusugi.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/vudajawivi.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ratefunerod.pdfIn PDF document text
    • https://madovokego.weebly.com/uploads/1/3/1/4/131409717/mavenubijati.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/fe34ed819a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f88bc81ebc07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f86f520ca998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f8892a9950d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f873876604c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f88ba00348f1.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/73749ac8-6402-4362-a566-1a57f86b84db/60546965192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c64c59-4dec-43bf-81d2-96d1d5a91f32/32355644005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd6d5a4-6086-4861-87c7-7c2ee21d568e/16438059769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21e9568-80d8-42ae-8a62-97fa204063d9/vipuzafikofigux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ce878d-2ef0-47bf-9628-0ba7eed8cf44/34198324587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/1621916399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4122/4869/files/zupeveboweli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6530/1400/files/49402636709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9382/3139/files/98512870665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8140/8416/files/chapter_4_atomic_structure_answers_key.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5612 5600 bytes
SHA-256: f24b0c0cf203d7435ccbfa0a637987ef7b408c91923227541b6be0cb0a3318ad
font_01_sfnt_off000068e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E6 15128 bytes
SHA-256: c352a32ae902b3f75f008bc6f68ef2df4dc78c0f1f7cebad25c43082e7485d62
font_02_sfnt_off000093f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F6 16420 bytes
SHA-256: 887d0084074df1c8b3ecb2e98715a4270d41817dca4cafd61edcbd08b4653e36