Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffcee51b4e6c5a1…

MALICIOUS

PDF

70.3 KB Created: 2020-11-11 21:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3672fd1366469fed86854f05f80f38d0 SHA-1: 1da73f5865045b0877e1b31a510841a7688f0b4c SHA-256: fffcee51b4e6c5a14276777c8ba553e6d97f8aa7a45b40b2be3e5a36cb42653d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are part of a link farm designed to distribute malware. The primary URL, https://cctraff.ru/aws, is flagged as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure for a game download, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://cctraff.ru/aws?utm_term=toy+blast+game++for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5f989b71f03be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5fa0caccde1b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415526/normal_5f9ed08542cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f97d3a97d84a.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/2aeaed4.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/muxufenegolis-kebesazuriguj-sanaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5f90675c0a499.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/panuponi.pdfIn PDF document text
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/zupavepade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8fdf3d0f95b.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/bozomodilumisawatinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f8edc1ced81b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_5fa6f22e2494d.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
    • https://uploads.strikinglycdn.com/files/5d1a69cb-b0b2-424b-b917-b9a3a4d86cc6/81945189481.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_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 5208 bytes
SHA-256: b5a4c3b74fa4328388b5cadb33e7b559045fc171b31837970aaeb1e271414a18
font_01_sfnt_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 10204 bytes
SHA-256: 72ede952f5ac23c585ca9c045e392b7744ade61e5c0d6c1869b3386c437c3870
font_02_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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