Malicious PDF — malware analysis report

Static analysis result for SHA-256 1134abd50e7c9fa6…

MALICIOUS

PDF

70.1 KB Created: 2020-10-28 05:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1d7974bd3af58dfaa52b2013dbbd4dc4 SHA-1: 345b0c49eed37abb10ab8ad7a8cfcb45891eb0a0 SHA-256: 1134abd50e7c9fa6ad69d740de8fa970ec069f1fbef06aa36636dd5e3b0741c6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a search query, likely intended to trick users into clicking through to a malicious site. The presence of a link farm heuristic further suggests an attempt to distribute malicious content.

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.club/123?keyword=does+kino+der+toten+have+pack+a+punch In PDF document text
    • https://vapipokolodux.weebly.com/uploads/1/3/4/3/134307816/2857569.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/6c66d7916.pdfIn PDF document text
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/pozemowopuz-nupedomizo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/77491274433.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/barikisow.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/makipavij.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/wetugitiziduradife.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/behind_blue_eyes_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/thomas_calculus_10th_edition_solution_manual_part_2.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/business_plan_sample_download.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/millennials_age_group.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1cfcaa5-6cc4-4525-9540-e21a5dc6fc0a/tuwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d363155-4de5-45a5-9bec-feca1ac3550b/47397939932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8049bdf-1298-4e90-9ad0-6f3353859f00/40281831136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860f2827-cf66-4819-b50a-63436254134d/8739636123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed36bd8-8f5a-410d-b045-9b85175851bf/27217580243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f320a0-c3e5-4e78-badb-eb4459d7d24d/karamojaxupadoguruvudelek.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_off0000d3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FF 5252 bytes
SHA-256: cacbecf508bfc7d100e6ad04758046dac3b5238785376c84decf2324ec657779
font_01_sfnt_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 11068 bytes
SHA-256: 2428f2f7ae058243987bd6c7c25d8b400284d5c25ed3740c795307dc3d52232e

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