Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3ab905d336a156…

MALICIOUS

PDF

78.0 KB Created: 2020-11-04 21:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1c788cc0d4c5a9c94467585fccfe36b2 SHA-1: e84f60c053e125562803c0abfcd0204cd0081e13 SHA-256: 3f3ab905d336a156a73170e994a8461b19e22922c3069f57ecdb96ffe46d3bda
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to known malicious redirector infrastructure and are associated with brand-impersonation phishing lures, specifically mentioning Amazon. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector findings, suggesting the primary goal is to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/8441923.pdf.
  • 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://ttraff.cc/123?keyword=guide+gear+deluxe+18++x+18++teepee+tent In PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/8441923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f8b569f68b0d.pdfIn PDF document text
    • https://ruxikejogotiwo.weebly.com/uploads/1/3/4/5/134576655/35b802bd24e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f8be0ff1770c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f87635a3e726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_5f9e5426ec749.pdfIn PDF document text
    • https://juzukixidud.weebly.com/uploads/1/3/4/4/134453884/rosugaleviku.pdfIn PDF document text
    • https://vilewufatavak.weebly.com/uploads/1/3/4/5/134585542/163344.pdfIn PDF document text
    • https://wigotimobegevuj.weebly.com/uploads/1/3/4/3/134312632/cc48cd10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_5f9d067687fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f883d5e84579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f8a4558bb368.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/5d671493-d3bf-4df6-bb00-c4eb4c6d772d/96639686047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4538d39d-4cbb-4d06-acac-6518fa7f97e4/79601152640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1468934-2684-4fdd-863c-8adc9255e7d0/jojijafagiraxebizevegume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1acbae68-4aca-4c64-9677-0ea741b47150/49272529965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b029cc25-d278-4da6-bcf5-20b3a04c5be5/34380593978.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_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 5064 bytes
SHA-256: 7763129ceeb49b71f6085106c1581d44a880c05c7aaafafeb83154f95f21076e
font_01_sfnt_off0000f4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B7 11120 bytes
SHA-256: 354bbe528cf3695789f2c3f299494b7933e8d42be15d5b0e8c8ca6b9fc25a578
font_02_sfnt_off00011a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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