Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfb1feb221360e9…

MALICIOUS

PDF

39.3 KB Created: 2020-11-02 18:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 36eb77f27c7906aaa1f8903c3921750c SHA-1: 83b6f1090714428443feb93d98934933f6dfd01d SHA-256: dcfb1feb221360e94e1463e32e618b7ef2c9db89b0796a195e7fca85dae4cc33
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document is identified as a malicious redirector and an advance-fee scam lure. It contains numerous links to external PDFs hosted on disposable domains, likely to inflate search engine rankings or distribute further malicious content. The primary link, 'https://gettraff.ru/strik?keyword=warranty+deed+mn', suggests a phishing attempt related to legal documents, aiming to trick users into clicking and potentially downloading further malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=warranty+deed+mn In PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/648a44abab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5f972a9322c0c.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/293d496f.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/genajuxamesepita.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/jinimudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5f9b91cc42f1d.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/gogot.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/254259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f98d768e9773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8817f292037.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/c4afb53f-afe3-4cfb-90da-b40f8786587a/civilization_5_community_balance_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b61eb8-0e94-4e9f-999f-1a4c87c4f216/51621860644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd40a127-589a-456f-b2f2-e250a9256286/kupamamusam.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_off00005ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC6 4876 bytes
SHA-256: d35135662795c4778fb1ac150dbb50562db04bf60b074ae7a15728d9ef053666
font_01_sfnt_off00006f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F57 9728 bytes
SHA-256: 626afbee700b2de03fa3fc78d0cda4cd1b09bfec72ab311184479eb0c5a64e4f

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