Malicious PDF — malware analysis report

Static analysis result for SHA-256 483661691c21f55a…

MALICIOUS

PDF

34.2 KB Created: 2020-10-05 16:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 73689ffc3b518397b8db6856028016d6 SHA-1: eaad4646577989cef5854393a995b1f539f83dd1 SHA-256: 483661691c21f55a31a0965ba2d4159eb42c2ab5e7895462c64f002771f0d489
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.club/pify?keyword=angry+birds+star+wars+rebels+telepods In PDF document text
    • https://site-1039618.mozfiles.com/files/1039618/38630684079.pdfIn PDF document text
    • https://site-1040210.mozfiles.com/files/1040210/napilegiv.pdfIn PDF document text
    • https://site-1038344.mozfiles.com/files/1038344/pisukojisijejumaguluri.pdfIn PDF document text
    • https://site-1038541.mozfiles.com/files/1038541/bofobexeforolovoxu.pdfIn PDF document text
    • https://site-1039219.mozfiles.com/files/1039219/84256657156.pdfIn PDF document text
    • http://nutur.thecornerstohr.com/uploads/1/3/1/4/131409546/6433884.pdfIn PDF document text
    • http://pusixobuj.fitchburgeconomyoil.com/uploads/1/3/1/3/131383444/dufolimeropelil-jeluze-wovagi.pdfIn PDF document text
    • http://dimokax.careathomeiow.com/uploads/1/3/1/4/131438477/08f3d8a591.pdfIn PDF document text
    • http://files.dufp.co.nz/uploads/1/3/1/0/131070566/nerokejunevuvep.pdfIn PDF document text
    • http://movitiwix.polarcenter-bg.com/uploads/1/3/0/8/130813030/c57a05.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/fbe51848-878c-405a-b33a-fb054ff1c3f8/mowuwadabogabulapiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25c2e85-0e56-48f2-a3a5-53d72b69a9a7/72981669754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890dbfb3-21f6-46cb-a096-8c4e76a86d30/tejofuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0104b5f-80d7-429d-840b-9487a148316b/89382434345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a718104e-04a5-4b7c-ab9c-0d2c8f6fa58b/kediwatogit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b75c22b-531b-4f58-9885-f60cb0b44f97/zususawuvaluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55fb208e-5a7d-433c-b953-0c53f1d3dfa7/83765803524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99af43ed-6183-4ee8-a913-5f141ae76368/58020726259.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_off000047e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E7 5452 bytes
SHA-256: 7848f27ff11c82da5d0a900ecc12bdf516ff37f3c3b8a9e48a3bf347d81e9e25
font_01_sfnt_off00005a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A91 9692 bytes
SHA-256: cb11c2ae2a5704610700621f363f6172f2fd4240c2921005338e10d368b3bdd2

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