Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa7e026c43e333d…

MALICIOUS

PDF

44.0 KB Created: 2020-11-06 00:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d67167d0cd4338fec5d2c30a013091fe SHA-1: 95041f4b3b6b826355293d5be612e74e24af0267 SHA-256: 3aa7e026c43e333d101c106f7c8c39c3460afafb7a5913706c7ed5d84df026d3
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ggtraff.ru/strik?keyword=fishing+guide+license+alaska', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to a potentially malicious site. The presence of multiple links on disposable hosting further supports a phishing or scam attempt.

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://ggtraff.ru/strik?keyword=fishing+guide+license+alaska In PDF document text
    • https://jilanuma.weebly.com/uploads/1/3/4/5/134522828/7132358.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/pigix.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/3080867.pdfIn PDF document text
    • https://jojimixumomural.weebly.com/uploads/1/3/4/4/134438106/pivotubub.pdfIn PDF document text
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/susuzoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f95b299866da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_5f98393204f97.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/navexarozubuzupo.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/nelazudoluxo.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/7b3025fe-aee5-41e0-9603-144189ef4746/20784162709.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/ti36x_sigma_calc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d207af5-8f70-462c-909d-26d19b14a704/minecraft_launcher_offline_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6552ae2-b0f1-4dcb-a62c-844b92f8fa07/kuriwumixorurosadosurib.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/46405979124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8570fa60-8127-4245-acd8-ad7a25b75ea5/35479100672.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_off00006d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D66 5124 bytes
SHA-256: 00b0203912b35c33948615eb6d2410efd63ca46d28577f5d369bd7e2852753bc
font_01_sfnt_off00007edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDD 10556 bytes
SHA-256: 482fbe861ee124321da109c722e9c9e415b91e9405336d191091f641b384323e

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