Malicious PDF — malware analysis report

Static analysis result for SHA-256 2690747d168b6aaa…

MALICIOUS

PDF

70.3 KB Created: 2020-12-17 10:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 21164975304debb579c8d3bfe5ca01bd SHA-1: ba6f3081f287ea9cc3463cf499b1b1141495a005 SHA-256: 2690747d168b6aaa055803c5cbfebdd88a762e9bde6cf6051be9224d423f7cb6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm, with numerous external links. One prominent external URI, 'https://traffine.ru/123?utm_term=same+sex+marriage+research+paper+introduction', suggests a lure to a potentially malicious website. The document body, though heavily obfuscated, appears to be related to the URL's subject matter, reinforcing the idea of a deceptive content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/123?utm_term=same+sex+marriage+research+paper+introduction PDF link annotation
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/ecda69f6bae941.pdfIn PDF document text
    • https://modofanapaf.weebly.com/uploads/1/3/4/6/134676621/1af6e7f6c42.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://s3.amazonaws.com/satudifin/advantages_and_disadvantages_of_aida_model.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/bupilowofowepofidufi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/english_speaking_tips_and_tricks_in_hindi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc016b9c30a162e0c4e17a3/t/5fc4237b3c6ccf69f3e14427/1606689659733/build_prop_editor_apk_mirror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b66b8b4-93ad-4071-afe9-5c5ce0fe43ad/magic_mushroom_tincture.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/jukotesuvunibuvutal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1ddc0c-d9bb-41c4-b2cf-05dd73aa512d/vizio_service_manuals_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/30078060853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7b4538-b86f-4e4d-9502-b203afd19c19/podazelaganalageji.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/pozunaxofal.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/top_free_games_online_no.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6743f88c99b6d37cd7f20/t/5fd1b5267c12252903f2c9af/1607578927068/new_hockey_fighting_rules_unsportsmanlike_conduct.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_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 5508 bytes
SHA-256: 3c25115f7c91ee91419edee3170c56c2d854c25588f26229ccec132067c6fb3e
font_01_sfnt_off0000dc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC28 9820 bytes
SHA-256: 6f8b00fba74f9d132ea405af37ef1ea8042d3f7c5d2b7e404fe5d52f43565903
font_02_sfnt_off0000fdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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