Malicious PDF — malware analysis report

Static analysis result for SHA-256 8176a76353984c6d…

MALICIOUS

PDF

36.9 KB Created: 2020-10-16 01:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 98cc00707ad20c69f3cbd3020c436fa6 SHA-1: 2f02f9f8efbd1e005c43a5570a1b5c8067730fa8 SHA-256: 8176a76353984c6daafacd6224f84fda02bb08bc6898998896cfd287d8d20eb5
154 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically advertising a "youtube music downloader". The primary malicious URL identified is ggtraff.ru, which is flagged as a redirector. The document body and embedded artifacts suggest a lure to download or access further malicious content, likely through the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?keyword=youtube+music+downloader+android+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f88b9d690e7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f88c20bb84bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f87240e4da46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f88bd0499e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f8814d7bb018.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/maxisite.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/kedizexexufatuzojix.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/5694357.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/mobafewod.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/ac44ec94-d26a-40aa-b6fb-27f69d47e100/tulafumogiparikiguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5402c2a9-b705-40ef-b0db-6d1b153ecf03/45945374627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c622c8-c74c-4f7f-9be5-f4a633aa7c92/57053262391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9a2754-4c0f-4717-b5b4-f9668ebc64d5/3087202549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d48030e9-009c-496e-b10c-6edd7e6612ae/87069174337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9433706f-807d-4729-8175-9b01be547265/xoxenemiwejeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9578c3-ef70-4150-af73-1ff501d56062/34801362738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a7498f-fce8-404a-bf91-79f82db7c13a/rojujometogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7d1792-5842-4987-b8f8-5411ec5883a3/17933188760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c959245-36ce-460a-8678-0ce071b557fe/rujupa.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_off00005312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5312 5552 bytes
SHA-256: b9fd02c6790fc7a341546f82ab7278a784ef6958945c41a6462d2eec20fdd704
font_01_sfnt_off000065e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 9292 bytes
SHA-256: 8195f9b6488cc451a2de4466aecb3148175aaa8182204d1c9d5cb8e80a63a964

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