Malicious PDF — malware analysis report

Static analysis result for SHA-256 24903f61236612fc…

MALICIOUS

PDF

41.8 KB Created: 2020-11-05 04:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: da058089cc69809f1cfa4bc9d606fc41 SHA-1: b07abeb900f054773597c66e2d30623b28f928b2 SHA-256: 24903f61236612fcf8d93232c9984b4b32e95cda1a04cd354b1634330283d479
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure, including the known malicious URL https://ggtraff.ru/123?keyword=read+the+titan+s+curse+pdf. The ML classifier strongly indicated maliciousness, and the link farm structure suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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?keyword=read+the+titan+s+curse+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f8912ed2f0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f9a15f9a0a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f9ad926ed221.pdfIn PDF document text
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/verokor_ronigudinumuj_laferinikokisub_kixif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5fa32f8560ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f9ceb92a52e8.pdfIn PDF document text
    • https://sinepakeje.weebly.com/uploads/1/3/4/4/134490574/cbc7b.pdfIn PDF document text
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/4040503.pdfIn PDF document text
    • https://lidenezat.weebly.com/uploads/1/3/4/3/134382714/xigovaneti_kovawekorib_duxedurajudusoz_sitesidaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f9b73ad53618.pdfIn PDF document text
    • https://kebudojud.weebly.com/uploads/1/3/4/4/134400915/3864075.pdfIn PDF document text
    • https://viwawisigox.weebly.com/uploads/1/3/4/3/134342504/ditiratiz-gorumulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9823/4773/files/38187279274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e29306dd-4311-4bdf-b2fa-8ef2d7bea4d5/savibulawomonuxol.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_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 5220 bytes
SHA-256: 084fdad29db85ee349056b62051a24f2caa1811283d3f2516b0363a8f7455405
font_01_sfnt_off0000773b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773B 10472 bytes
SHA-256: 9abbd315b38ee9ddb90e122525517b86337a49e6294d49eb7352962ba8b5bb29

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