Malicious PDF — malware analysis report

Static analysis result for SHA-256 017810a30c751e40…

MALICIOUS

PDF

54.7 KB Created: 2020-07-08 20:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3ae41236cd1c88922aa6af6aea9b4978 SHA-1: 5ef0290902aa914e30d2ffc8a27efb03bb0ca068 SHA-256: 017810a30c751e4040bbc61f2d902f9003529e33d3d1b448d7018f34438ac3d5
184 Risk Score

Malware Insights

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

This PDF document functions as a link farm, embedding numerous URLs that lead to potentially malicious redirector infrastructure. The document's content, including the title 'Fasciite necrotizante pdf', appears to be a lure to entice users to click on the embedded links. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL further supports this assessment.

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.ru/wb?keyword=fasciite%20necrotizante%20pdf In PDF document text
    • http://files.rascalmartinez.com/uploads/1/3/1/6/131606335/2837757.pdfIn PDF document text
    • http://files.forgedtecholsters.com/uploads/1/3/1/4/131437225/fedepidun.pdfIn PDF document text
    • http://files.melissagunasena.com/uploads/1/3/1/4/131438468/josobivituraki.pdfIn PDF document text
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdfIn PDF document text
    • http://files.ninsandneedles.com/uploads/1/3/1/4/131414516/papereji_xobefufaxezel_nebaru.pdfIn PDF document text
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdfIn PDF document text
    • http://files.seedingreciprocity.com/uploads/1/3/1/3/131398367/1518556.pdfIn PDF document text
    • http://files.tworiversrecovery.com/uploads/1/3/2/7/132740860/91cf8adff.pdfIn PDF document text
    • http://files.artoutofdakota.com/uploads/1/3/2/6/132695493/4805215.pdfIn PDF document text
    • http://files.mccoysactionkarate.com/uploads/1/3/1/6/131637919/tameb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nojilibap.files.wordpress.com/2020/06/nigagirobilaremazogezud.pdfIn PDF document text
    • https://dofakava.files.wordpress.com/2020/06/gavelufuvurunema.pdfIn PDF document text
    • https://satugovanuw.files.wordpress.com/2020/06/65748571018.pdfIn PDF document text
    • https://wegekenir.files.wordpress.com/2020/06/66825243473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000957b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957B 4912 bytes
SHA-256: 13876d5444f48f269863602f65cf54623beac98719d76ff27c09c43b546f487b
font_01_sfnt_off0000a635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA635 13328 bytes
SHA-256: 505f9f3d7d2a90f2809f7be8de5a2096a813dbc31285b6d3882abbec57a54b13

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