Malicious PDF — malware analysis report

Static analysis result for SHA-256 2855ddb4597476ef…

MALICIOUS

PDF

40.2 KB Created: 2020-10-03 10:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8e1baed1f695f929815a90a283d8bf0d SHA-1: 39ddbc40cda6b5d66b7a18944b58ea1c98220ab1 SHA-256: 2855ddb4597476ef7fdc4c0b042d08ce1ab4c5f586436433e6bb750e0f1ef19f
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/pify?keyword=t-test+results+table+apa+format In PDF document text
    • http://bigavon.homesmithvt.com/uploads/1/3/1/4/131437736/7256414.pdfIn PDF document text
    • http://files.illlaladesigns.com/uploads/1/3/1/3/131383475/woxufikud_zutevogorar_vatuxizunex_nasenujaveli.pdfIn PDF document text
    • http://files.rcfenceanddecks.ca/uploads/1/3/1/6/131636917/tabakezod.pdfIn PDF document text
    • http://files.cavespringhsband.com/uploads/1/3/0/7/130775539/744881.pdfIn PDF document text
    • http://nosuvogux.kitchen-envy.net/uploads/1/3/2/6/132695829/vafivu-turofime.pdfIn PDF document text
    • http://vujeguv.djjohnnyblue.com/uploads/1/3/1/8/131871726/907e2a66.pdfIn PDF document text
    • http://files.missrodeowashingtoninc.com/uploads/1/3/2/6/132682549/9831277.pdfIn PDF document text
    • http://files.praxismachinecodinglessons.com/uploads/1/3/1/0/131069897/nipiwogof.pdfIn PDF document text
    • http://kaximijok.mswaitwhat.com/uploads/1/3/1/8/131871390/tedezalipedid-vugudagi.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/de5ad52c-26ae-4479-93e9-65faa049604f/paxanopuribozunesetejedeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6303/8118/files/dasunipebakefegiferot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8667/8683/files/duromax_xp4400e_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4747/6648/files/usaf_epr_bullets_education.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_off00006078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6078 5168 bytes
SHA-256: cf5163274f24400f432e14eb0abbdba81197cb15bf1f6fc79af68bdf88476854
font_01_sfnt_off000071f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F5 10048 bytes
SHA-256: b7a327cf5066a00b53ebb3a120a92f8f9b3f2d9e27e8cc6e19ca1657daedb03c