Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e28bf5e475a0c3d…

MALICIOUS

PDF

50.2 KB Created: 2020-11-04 08:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 204e555ad40a2f8d5ef37140399b8440 SHA-1: 3479de6db3d5789cd7780e406e8a2b357cad6776 SHA-256: 4e28bf5e475a0c3d5d6ceb45b3d0aa98a89e99a8dd936571b37d1495f794a554
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting or known redirector infrastructure. The primary malicious URL identified is 'https://ggtraff.ru/aws?keyword=battle+frontier+guide', which is flagged as a malicious redirector. The document's structure and extensive linking suggest an attempt to lure users to external, potentially harmful sites, likely for phishing or malware distribution.

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://ggtraff.ru/aws?keyword=battle+frontier+guide In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/52943516b6e.pdfIn PDF document text
    • https://wojawafelufofux.weebly.com/uploads/1/3/0/8/130813934/2128366.pdfIn PDF document text
    • https://bosesabefo.weebly.com/uploads/1/3/4/3/134362720/5050089.pdfIn PDF document text
    • https://luretazolikaxu.weebly.com/uploads/1/3/4/5/134587875/zisefawu-denoxum-bufulifof.pdfIn PDF document text
    • https://zupelewelasilag.weebly.com/uploads/1/3/4/5/134594614/naxupazuliw.pdfIn PDF document text
    • https://letuwolisabir.weebly.com/uploads/1/3/4/6/134602086/gabiwaz_nebiwusew.pdfIn PDF document text
    • https://linezeludamaxen.weebly.com/uploads/1/3/4/3/134340908/7f655d568b6.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/zavepogerefe.pdfIn PDF document text
    • https://nirumoxizexajiv.weebly.com/uploads/1/3/4/5/134524745/bedovas.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ralas-tapupav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/911b1c6f-7843-4215-bd30-d7016ec4d921/idoc_verification_worksheet_name_of_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e82500-d354-43ea-af6f-f2c73311c1d5/jeramujipafunanoledubepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9dd37a-6117-456f-a799-d43343cdbddd/87007564243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6405e519-575e-4be6-9b25-ed7f8601944c/18171817182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62131212-8e9b-49f7-b1aa-72a53fadf207/banogiguruzomafironomufe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 4828 bytes
SHA-256: e26b97dc62849b36b077281c2a2d8a5f0d5d6f9832fa25e81998b5886c42d9df
font_01_sfnt_off00008a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A45 10456 bytes
SHA-256: 7dafe90e25e3621086d7a9227a196c294faa3dd78845ed907a4166d66ae334bd
font_02_sfnt_off0000ada9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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