Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1deba158f4f6798…

MALICIOUS

PDF

79.7 KB Created: 2021-01-21 20:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 470906a8e9c6d8d775f27e159ac21441 SHA-1: 0fd64fec2b0a9b1208298b43e27a423fc9185422 SHA-256: a1deba158f4f6798084cfdc737a5a128b895749052f732aad27c5815f821b358
184 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ggtraff.ru'. Additionally, it was identified as a link farm on disposable hosting. While no scripts were explicitly extracted, the nature of the links suggests an attempt to lure users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=light%20pink%20room%20decor%20cheap In PDF document text
    • https://zijoganidilo.weebly.com/uploads/1/3/1/8/131856317/fixamasusaz-sewerobov.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/5836449.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/beat_hip_hop_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fc671083f657.pdfIn PDF document text
    • https://lowobuganigazo.weebly.com/uploads/1/3/1/1/131163610/bamujotezuwakame.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420766/normal_60044d9f6d3b3.pdfIn PDF document text
    • https://sixumegeb.weebly.com/uploads/1/3/4/4/134476160/4cfa495a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471479/normal_5ff9bc1de9664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://poravilotizeve.epizy.com/bastille_all_this_bad_blood_rar.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/former_green_lantern_corps_sinestro.pdfIn PDF document text
    • http://govatojajij.epizy.com/action_plan_template_for_business_development.pdfIn PDF document text
    • http://jatuxijor.epizy.com/travel_company_eclectica-_guide.pdfIn PDF document text
    • http://jolivawojo.rf.gd/hormogonia_formation_in_cyanobacteria.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_off0000ed8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 5068 bytes
SHA-256: f16e693cc5c5d548d7d2c03500a2da7c345d0a189b55c86c746bd64cbfea2a8e
font_01_sfnt_off0000fe90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE90 10944 bytes
SHA-256: 719aeeae04d843049ab13cbf999bd72f90f2ea03253db485dfbcca10bad1cbcd
font_02_sfnt_off000123c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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