Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd562e2dc98301a0…

MALICIOUS

PDF

44.5 KB Created: 2020-11-04 15:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d5930f3529fcdf8701e2b131a0710bb4 SHA-1: 92a02b656963af01400d114dcc80764ff5ddadb8 SHA-256: bd562e2dc98301a074d602641a1ac0682aee0dd5674b45ee16e54dc9b26715a1
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The primary URL, https://ttraff.ru/123?keyword=nmr+integration+line, is flagged as malicious. The document's structure and content suggest it is designed to lure users into clicking these links, potentially leading to further malicious content or exploitation.

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.ru/123?keyword=nmr+integration+line In PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/votudiwexajawefu.pdfIn PDF document text
    • https://zijavenokin.weebly.com/uploads/1/3/4/3/134315340/viwukiwoza.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/sevubinizibalux_bidon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f9354f5507a5.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/bf7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f8d77897deef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8c3b08deb27.pdfIn PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/7990513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f87be49b90a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8bf2d54eb10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f962404ae16b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/votoxuzaroridenasupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/jokenurenuxevadowilix.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_off0000717a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717A 4796 bytes
SHA-256: 2f2fd019929f01c2e2a0b507ce0a009e8e0907b599741ff197ad8c7448c512b9
font_01_sfnt_off000081b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B7 10396 bytes
SHA-256: 7111ca7311bd192a5c2dcf5aeceed1abfc83cf0a74f5c866d99f9baf7e55f294

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