Malicious PDF — malware analysis report

Static analysis result for SHA-256 907feadaed3e93a3…

MALICIOUS

PDF

42.3 KB Created: 2020-10-29 20:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 887ef4d66da05b1d5feda1e841c02233 SHA-1: 1e2bfc9e2e49e28caf38074c8f7da9d89c65d434 SHA-256: 907feadaed3e93a356f8b08ffbcf5ccd0a9a51ca611f51296317b9a05c42229a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics indicating it's a redirector and part of a link farm. The primary malicious URL identified is `https://ttraff.cc/123?keyword=outcasts+of+poker+flat+pdf`, which is likely used to redirect users to further malicious content. The presence of numerous Weebly links suggests a coordinated effort to distribute malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.cc/123?keyword=outcasts+of+poker+flat+pdf In PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/xupedulig-dokefe-tulozakopodi-nisixupafof.pdfIn PDF document text
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/8641615.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/6432889.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/2464977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f98899406d97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9bbd51-9498-41c0-8501-3594602b0fa8/66989813953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9399/2640/files/convert_time_in_milliseconds_to_date_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2685/files/trade_union_act_1926_law_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5698/2937/files/polyscience_sous_vide_professional_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37964f2c-459a-4834-a9c4-f09e27e7d4f2/digiwekirobuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20eeb029-7a02-4fd1-a542-16b905ac0a75/6711169078.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_off000067cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67CB 5240 bytes
SHA-256: 8ab0084598d77950046d1ca1631f52aaa74f0da56eaa500995189db1823ad947
font_01_sfnt_off000079b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 10196 bytes
SHA-256: 48650ff233e815fdee8c75ca0a239ebd175b20f1da808b9a0371ffba3b550d9c

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