Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ba204586dc3587…

MALICIOUS

PDF

86.3 KB Created: 2020-11-25 04:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 876e92eb8e65414f6a7e2f0b0a669434 SHA-1: 3aa16bd0ac61980984ed23f500a27137558f6c2d SHA-256: 17ba204586dc358759158c13865290f521331ebbae317c154bfd2effb1ae31fd
244 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, masquerading as a free download for a popular book. One of the primary links, 'https://ggtraff.ru/123?utm_term=beautiful+chaos+robert+m+drake+pdf+free+download', is flagged as a malicious redirector. The file's structure and link farm indicate a phishing or malware distribution attempt, likely leveraging a PDF exploit or social engineering to redirect users. No scripts were extracted, but the embedded URLs and link farm heuristics strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://ggtraff.ru/123?utm_term=beautiful+chaos+robert+m+drake+pdf+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5fa82a0185c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_5fbd634f25181.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/gotixarifut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_5fa2a4e9135a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_5fb37403b9b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f9c33ba9fe34.pdfIn PDF document text
    • https://fadexawotizetav.weebly.com/uploads/1/3/4/3/134339615/bejifimatobad.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/kofizajibol-sasabizamodaxal-mevogaxi-mozujirek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5fb5d29edc7a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5f9947d09b45b.pdfIn PDF document text
    • https://mobugozuko.weebly.com/uploads/1/3/4/8/134869294/gotezun-junudemuwin.pdfIn PDF document text
    • https://kerijene.weebly.com/uploads/1/3/4/3/134367262/cbf8a73d.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/wenobagupexekap/asn._1_format_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/jadobosowutad.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/information_about_provident_fund_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e88a0506-3efe-423e-ab6d-ec3c79e5743f/semibaduma.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/69611048255.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_off00010340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 3356 bytes
SHA-256: 3b7bc57468a6696796e5aab182e4788bbc377c45249f97e1a57ef1a3c8c0c050
font_01_sfnt_off00010f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F35 5740 bytes
SHA-256: a510d2296529873b90e22fff8135ec304ad6ab71b125a58210376991e61d8f7e
font_02_sfnt_off0001229a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229A 12268 bytes
SHA-256: a8504accf7ba5c83bff9612740085176efb029f8ebb3fbebefffe57d833e6dc0