Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3852147ebe261d…

MALICIOUS

PDF

65.5 KB Created: 2020-10-27 22:13:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 160d1cef0df3090ca7e3e50d4f4c74d8 SHA-1: bf60ae5c548945e36dfd84419628c0b38c8f9062 SHA-256: 3d3852147ebe261d59e891067f69aa12f26a1519ae5450c0816e4aa7013b2af2
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/strik?keyword=ruger+p95+trigger+pull+weight In PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/lanesesubixata-ruxisodufuset-tofuwaxe-ruteko.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/paxapeli_dulovebebaxo_pofeligor.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/nowojuvipixo.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/9222131.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/xarevurozurovip_wukefem.pdfIn PDF document text
    • https://denibizokitig.weebly.com/uploads/1/3/4/3/134340328/bee47e6d9b01f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5f920fbd77385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f92ded68e7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f8f3da04ad7e.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/7965169.pdfIn PDF document text
    • https://bajumavo.weebly.com/uploads/1/3/4/4/134486103/b0eede2.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/lurilu.pdfIn PDF document text
    • https://xujiwedebul.weebly.com/uploads/1/3/4/3/134317386/f36df.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/7341459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8a460856bae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f907771ed044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5f95698013928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f9064d82e112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f8a8afd6e287.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/00ea5378-71f4-4afd-9e67-d8853cdf0e46/45295894224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bac4422-8c85-426c-91f1-c8ec59af2e6b/4608552292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f525a452-ca2e-4db6-af3b-38f49d07172e/22961963626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7ad3d8-432e-402e-8c1b-6c669f041980/2423259334.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_off0000b3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A0 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000bde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE3 5072 bytes
SHA-256: c8765aadb3f15b9df7e6a0db3f27080606ac15489a2ce516df4af4b19aeb2cde
font_02_sfnt_off0000cf40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF40 12444 bytes
SHA-256: a44faca58492204c71d90b6d8bd7a6be4bf2d589edaab84398354f53ff11188c