Malicious PDF — malware analysis report

Static analysis result for SHA-256 875752518b544950…

MALICIOUS

PDF

49.8 KB Created: 2020-10-29 23:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 3a4f88eae65d9254aea84ff03a515fb1 SHA-1: bb8a8816d976d36f735cae069103e94b733ec04f SHA-256: 875752518b544950978ee88d6ea351e47cda6db34fc7c2721d7393b1bc87ed86
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.cc/123?keyword=star+wars+bounty+hunter+cheat+codes+ps4 In PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/newufotilubutifo.pdfIn PDF document text
    • https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/zaladuxit.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/zivipurevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f89198d933bd.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/tabusulaf.pdfIn PDF document text
    • https://zovijewef.weebly.com/uploads/1/3/4/4/134400079/xurojuxokipe-nolukobifu-pudim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5f918eda46b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f8fb35c18a31.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/f3b173ef-ff24-4b55-9603-b10f3f29854f/15864640349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8624/2483/files/zubamitikatogofemino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3187/7544/files/19669961297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9542/5949/files/taguchi_optimization_method.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_off00008371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8371 5652 bytes
SHA-256: f4a211f33bf4a0cbaa35b64e1a5483b75bf0809fbbf4455408c6abce443a8ecd
font_01_sfnt_off000096be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96BE 10556 bytes
SHA-256: cfe284e7b8f346672381b42e036a885876f67a2e2a5424343282dec7ce646eb8