Malicious PDF — malware analysis report

Static analysis result for SHA-256 1559cf97160d411e…

MALICIOUS

PDF

44.4 KB Created: 2020-10-03 12:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e292abb5213bf12380a4bb5e5f1bf458 SHA-1: 762f7005816833847b75b663bc084842da0f6c71 SHA-256: 1559cf97160d411ed2a43ae1813ed9f64eab3eb3c63e985485a55a23ceba25af
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.link/pify?keyword=advanced+systemcare+key+2020 In PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/jijakesugotibiwal.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/42992681512.pdfIn PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/fujarikelesutumuj.pdfIn PDF document text
    • http://jiwimaxod.patrickcoopermusic.com/uploads/1/3/0/8/130874493/3784238.pdfIn PDF document text
    • http://lilere.triplexfm.co.nz/uploads/1/3/1/4/131483108/d3c667.pdfIn PDF document text
    • http://files.spicerorchards.com/uploads/1/3/1/3/131383750/ee12ba.pdfIn PDF document text
    • http://files.armadaseamlessgutters.co.uk/uploads/1/3/1/3/131381021/vojoxu-xonetisomel-bejekebi-tugeronixo.pdfIn PDF document text
    • https://site-1042880.mozfiles.com/files/1042880/daseteru.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/faxutanolelodedu.pdfIn PDF document text
    • https://site-1039656.mozfiles.com/files/1039656/nerexizuxavorogunix.pdfIn PDF document text
    • https://site-1039182.mozfiles.com/files/1039182/lojebojagida.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/dakaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3594/1285/files/moors_and_spanish_land_grants.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_off00006fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB1 5540 bytes
SHA-256: cc87b6e1590e4b19df75952858db3a133c0f56f9b2dea1f4659b19a4e51d4b31
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 10204 bytes
SHA-256: 69528f7731e41a7f5a4187dca2f09554e1464117c102d6f86b8cfc464000e5c3