Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c5adb0b094549d…

MALICIOUS

PDF

44.2 KB Created: 2020-10-16 07:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b18a380f8bc11701ecddfdbe2de933aa SHA-1: d298224dfd050be422d0725a640203fb0d52763f SHA-256: 87c5adb0b094549d4f1e89e6029a76219a9886f620f2e78dcb86573f44decedc
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristics, suggesting the document's primary purpose is to drive traffic to this malicious site.

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 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://gettraff.ru/123?keyword=transparent+status+bar+android+pie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8770f7323e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f87506a2f44b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f87f73461229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f88d4a071c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f87a013ca9f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f86f9528c647.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/tozebifojutejumikiba.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/d6a726f.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/wujelagovawub.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://site-1043200.mozfiles.com/files/1043200/30862637898.pdfIn PDF document text
    • https://site-1042968.mozfiles.com/files/1042968/rasoviwaxum.pdfIn PDF document text
    • https://site-1043771.mozfiles.com/files/1043771/tinurujovidaluxefifun.pdfIn PDF document text
    • https://site-1039320.mozfiles.com/files/1039320/gaximonipewunijigotu.pdfIn PDF document text
    • https://site-1039564.mozfiles.com/files/1039564/ziwunezirupamobowev.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/42a5a0c0-6e2c-435a-9f09-62f9fe6eca78/zuxagogoxep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27262867-a785-4a6b-9960-d00e2994bd50/finerotowukolitap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb495c28-57af-46da-89ab-07c5873de77d/velevogikolokubusokudil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f240010-9de5-4431-8666-4af404244cc9/fubatipedozojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4929f6-8507-4a5d-b2f3-d982139d95b2/bukodowunez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab65ac12-b04e-4d69-9007-20f2a615e399/49196712543.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_off00006f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5012 bytes
SHA-256: be3447c36f85915f98b73e2238aa32418bca45648c45ee4102619cf91ab1bf9e
font_01_sfnt_off0000806a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806A 10204 bytes
SHA-256: 49a741a0f8e7c6901d0d02c7f5100996748137322a9d4f6b6ef37b93cc5c7916

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