Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff28c9089fc48b1…

MALICIOUS

PDF

43.0 KB Created: 2020-10-07 16:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 607e02f25299cbdc861b009fe5523046 SHA-1: 68c7986a835bf24d014ace1eb751fb2436701b54 SHA-256: 9ff28c9089fc48b157262d1583c3adac32b92403f7de879dcc7058f60593e8df
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://ggtraff.ru/strik?keyword=killings+by+andre+dubus+pdf, which is highly indicative of a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=killings+by+andre+dubus+pdf In PDF document text
    • http://ladeko.biz-skills.com/uploads/1/3/1/4/131406676/xobenudexobefupure.pdfIn PDF document text
    • http://wimiwumu.sweethartbaking.com/uploads/1/3/2/7/132740285/c1c818dc67.pdfIn PDF document text
    • http://fodinabe.z-source.com/uploads/1/3/1/8/131856801/6566367.pdfIn PDF document text
    • http://files.malgraphy.com/uploads/1/3/1/4/131453268/tudaganute_memofodesiw_dorasebib_gufoke.pdfIn PDF document text
    • http://files.catherinereilly.com/uploads/1/3/1/4/131454523/paxekuvavuwip-fajizologe-guwebosapumer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56eaa279-648b-4924-a97f-422e95f8e02a/88697862528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51de8ab8-6b92-4355-9c71-4ffde2aac16c/kujujagojituzejanezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e308625-8990-4567-9004-23f320ab8ef2/tiwipinuwajoleketikarugov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d410b4d-94e4-459e-bf25-e0de328616da/zafukijafenesuzebalir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11d8277-5749-4c97-814c-f95f5b7d6cdf/80776320401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/california_dmv_drivers_manual_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/24055571387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2871/1077/files/liruxuvitive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4165/5454/files/life_of_pi_summary_shmoop.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_off00006afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFD 5420 bytes
SHA-256: 879463e6e75c211f0e20d28181b7597631fe90fe99e38b5257d1900990cfe719
font_01_sfnt_off00007d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D81 9980 bytes
SHA-256: 4f05f57fcfa0eec1cafb2b6122cc6d599fdbe524fbbb29f0a98fc0f190d0a061

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