Malicious PDF — malware analysis report

Static analysis result for SHA-256 20dc89a16f00f3ba…

MALICIOUS

PDF

43.7 KB Created: 2020-10-15 07:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b53377b67540c59b6dc39cec4754aad2 SHA-1: e69ad7f685e786aeaf430368c81616e0953b26a7 SHA-256: 20dc89a16f00f3ba7022ce3b7db610a8145d4293efbb0897713331369aab027d
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious infrastructure, specifically a link farm designed to serve search engine traffic. The document body, though heavily obfuscated, contains the target URL and keywords, suggesting a phishing or scam lure. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a link farm designed for SEO manipulation.

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=beats+studio+wireless+pairing+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f87ae9634c77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f8776238de76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f96cba1d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87b8c9a2007.pdfIn PDF document text
    • https://site-1042279.mozfiles.com/files/1042279/zaputalepazejajixitujope.pdfIn PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/lexepopufofojezufake.pdfIn PDF document text
    • https://site-1043536.mozfiles.com/files/1043536/94140119083.pdfIn PDF document text
    • https://site-1043397.mozfiles.com/files/1043397/guzabare.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/2993125.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/lipomemupixop.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/9325577.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/199877.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://site-1040125.mozfiles.com/files/1040125/gorixifenivo.pdfIn PDF document text
    • https://site-1048515.mozfiles.com/files/1048515/napenegazufikuvav.pdfIn PDF document text
    • https://site-1039380.mozfiles.com/files/1039380/dakozukajujage.pdfIn PDF document text
    • https://site-1039465.mozfiles.com/files/1039465/wizategimavevuju.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/a2ac25b7-702b-443a-9e36-87aed7a3b87e/75653621783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1b249a-9da2-448d-bfcc-99bda5206ca0/rapomufajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/chrome_apk_file_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4694/6974/files/kate_greenstreet_the_end_of_something.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1592/4630/files/phase_diagram_worksheet_compound_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/rusawugojeboxovodigaga.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_off0000690b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 5268 bytes
SHA-256: f425dbc2ea0c717c78e92d2ef7faeb068e78031dabaa66cd57abb8f2a6156bee
font_01_sfnt_off00007b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B10 11728 bytes
SHA-256: 267fe40bcb126ac0870ddce4005bd7695611b7368714941f329e6fe3aaa67bda

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