Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac74d2575c1e830…

MALICIOUS

PDF

43.5 KB Created: 2020-11-01 17:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d909ce3e8f9883986dbf29bbbbf9aa77 SHA-1: 718a299aa3e8eab60748e59c350be161300fc8ec SHA-256: 4ac74d2575c1e8304b983de313a333cda4a747615d165d5c7a5fe7afb9d606ab
124 Risk Score

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 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://ttraff.me/123?keyword=anglo+saxon+village+life+ks2+bitesize In PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/daxipinepejul_pesev_wefovi_bexawobawu.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/4cf0547c36c7.pdfIn PDF document text
    • https://wepebagelokej.weebly.com/uploads/1/3/4/5/134583559/526d8fa33ab8a6f.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/1a6c910bdfade0.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/reseki.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://cdn.shopify.com/s/files/1/0497/1164/4851/files/tp_link_av200_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5573/3153/files/seerah_of_prophet_muhammad_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d48b9538-afbf-43b8-af81-bb3ab7dcf18f/21344044920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a39823-347a-438e-9818-920d8e5f3e26/instafollow_premium_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b124c8a-5a7d-4abb-b4af-942b7aa60d44/gofowemilakol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45d52aa-bc2f-44d4-a9f7-ca98f0cc08a3/litumulogomovut.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/1531891403.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_off00005e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E25 5128 bytes
SHA-256: 1b32b89b8c60b9c69a313cf1857f67444fa4b727f6aee7bca6d1f2e26437e4ad
font_01_sfnt_off00006fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 10328 bytes
SHA-256: 658a5dfdd5a4d77c305c4e4ccb634655ea84da2beab89f7e056ef209a22f158c
font_02_sfnt_off00009327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9327 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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