Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3208a81fe570653…

MALICIOUS

PDF

46.9 KB Created: 2020-10-27 19:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5ab8813a6ed2821cf2ea4aa5b6e4a33 SHA-1: b98cd3b98adafb86a92647abad5267ffe7938a52 SHA-256: a3208a81fe57065351041d07f1aebd2c525499b70ff31cd832762fc47f94033b
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search result for "Stranger things neverending story piano sheet music". This link, https://ttraff.club/123?keyword=stranger+things+neverending+story+piano+sheet+music, redirects to known malicious infrastructure. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness.

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=stranger+things+neverending+story+piano+sheet+music
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f8cb3013f03a.pdf
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f9349cb895d7.pdf
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f87635b0938a.pdf
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f9296111e555.pdf
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f87136c660c6.pdf
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/vatim_pobavoxiduviliv_rewekodeba.pdf
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/e1a6a889073e.pdf
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/xufawuk.pdf
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/jagigoripututezuxim.pdf
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/bf3953.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wulagisi/adobe_photoshop_graphic_design_tutorials.pdf
    • https://s3.amazonaws.com/zategafozasiru/74113419040.pdf
    • https://s3.amazonaws.com/degisapemifa/cambridge_ielts_2_listening_test_2_section_4.pdf
    • https://s3.amazonaws.com/votuweroxigezog/test_anxiety_definition.pdf
    • https://s3.amazonaws.com/xanebavifamopez/tukelixusisunesejorona.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/ms_nut_bolt_weight_chart.pdf
    • https://s3.amazonaws.com/vatosolikijike/90959523752.pdf
    • https://s3.amazonaws.com/zuxadol/12470755731.pdf
    • https://s3.amazonaws.com/tugumeb/bayesian_analysis_for_the_social_sciences.pdf
    • https://uploads.strikinglycdn.com/files/9bb88c79-9448-4c74-af01-87385123c9b6/kafabewoxuzem.pdf
    • https://uploads.strikinglycdn.com/files/8e1c420a-4adb-44d9-b66d-43d015060e85/timupuxavenuxin.pdf
    • https://uploads.strikinglycdn.com/files/72f571f9-1737-4395-acc3-11b8e09f44f1/wubaremurozomalez.pdf
    • https://uploads.strikinglycdn.com/files/93f1726f-ffda-4059-9949-69d2c0634157/undeath_skyrim_special_edition.pdf
    • https://s3.amazonaws.com/tetazino/wilimirifewapewitobabe.pdf
    • https://s3.amazonaws.com/zifozujiwi/jepogosixa.pdf
    • https://s3.amazonaws.com/gifiz/biogas_advantages.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006905.bin
8ebd38cb2f0bdb903f72fd988986e434ac52a875d9d9d090f9d9bc268811228b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6905 5604 bytes
font_01_sfnt_off00007be9.bin
62d8d1863a206850baad5ea7b9c81d584503cb891417fc7d520acd57f7ca860a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE9 10412 bytes
font_02_sfnt_off00009f89.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F89 4324 bytes

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