Malicious PDF — malware analysis report

Static analysis result for SHA-256 de61ef197d6ffbd2…

MALICIOUS

PDF

74.2 KB Created: 2020-10-28 14:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 411d6e13e676719ac6d30adadba37932 SHA-1: d4489c23f9b141d3a9a6ccff2561c62a9cd75862 SHA-256: de61ef197d6ffbd2788ea945346f47614d499a32b054473e375b3cf012dac3d8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is designed to deliver malware. The document body, though heavily obfuscated, contains the URL and keywords related to downloading an Android application, suggesting a lure for users seeking game cheats or modified versions. The presence of numerous other PDF links, many pointing to benign content, indicates a link farm strategy to obscure the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?keyword=minecraft+15+apk+indir In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2393/9753/files/wovojavatidopawolikute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b4439b-333b-4e75-80fc-6447d8408f05/53036446389.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/sonata_pathetique_2nd_movement.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/editorial_apostolado_mariano.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/35319708476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/belt_conveyor_brochure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/volvamos_a_la_fuente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8701/1221/files/29659649081.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/nutipebubunuwolirofijafeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/possessive_nouns_exercises_for_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00bd02d8-b412-40b0-b3ff-c934969749b5/gapikesom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5219bf-c091-42f2-b368-0fa13f81b55f/pusiketajomu.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/kitchen_confidential_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6259/0116/files/como_adiestrar_a_un_perro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/pegarovopovanemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4dfdd55-af22-43aa-82ae-f9c71f91ec9d/22022391125.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/kundalini_chakra_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/20685312008.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/semi_detailed_lesson_plan_in_english_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2702/6079/files/vukapuzalenizixemuk.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/boy_scouts_medical_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb5c21a-5b6c-4a4b-bd02-df0a234cb999/28430030076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2890b1-2d6d-4f0a-a7d3-f06671ee5257/custommobspawner_3._11._4.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0000ecd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xECD9 25508 bytes
SHA-256: 913591f345640c69976e13167fdc5b10f775e16a7f54ab0a0fdb3b50ed4ec094
font_00_sfnt_off00009486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9486 3192 bytes
SHA-256: 471b0c0cd0da77d31511dd8a292807fef9e5a2584b9d58a21973bd6a7abbbad3
font_01_sfnt_off00009fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDB 5184 bytes
SHA-256: 7ac93f00f45cea3f30b855ba36afaee3ec5f0f4e45147d18335752414e3653d6
font_02_sfnt_off0000b19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB19E 6744 bytes
SHA-256: adb2bf67c6d5e165e7d82a0ef5233c220b6d4c6f4d8cf1f3f36295a2c3629b6e
font_03_sfnt_off0000c39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39B 13252 bytes
SHA-256: 8e2fe664563b38983f310bd3143be3e5620abb6bf670b6b5d79225631ade9ae1