Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f6a0d1267c22bd…

MALICIOUS

PDF

34.6 KB Created: 2020-10-28 10:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ce25f70ca5ea4842571e9625aaf2f9d8 SHA-1: b70d391305f82f0a1422a67001ab826ceb2c8d4b SHA-256: 18f6a0d1267c22bd7c0adf13c2a8f74679cb3b75e3cf2bfb833e7743b85a8b7d
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, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious link.

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.ru/pify?keyword=echo+park+elementary+burnsville+mn In PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/c5941865ac.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/2696676.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/cd2a817e-cd04-4b27-b32c-fc79c9ae1964/dazaligikunogupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b055b54b-ac7e-4336-999f-6468aab1a78c/28851236675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9603b9d-048c-4562-89d1-8f5a82c1b960/www.hotmail.com_create_email_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ca999c-db7f-4de8-b417-cbec64184aa4/tavixitofamuteb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec328646-d830-4265-bb1b-97921a01efb9/principles_of_information_systems_11th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9cf3e8-7efe-473e-86b9-13d05bdf08da/90802184889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc27e4d-e52b-4b4a-859b-ea4075a44c19/zepetazekoxigesakasuwosup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c70820a-25d8-4b42-a2e4-605e31a1ea06/77976387664.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/ukulele_fingerpicking_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/voretejoma.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/gulajodoz.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/2550763787.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/atex_zone_classification_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/modify_files_online.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/neural_100_mg_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4415/4791/files/57464452061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1889/7573/files/meet_me_in_st_gallen_movie_poster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1006/0196/files/10794709282.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_off00004ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE0 5496 bytes
SHA-256: bb33ba886d358240aa313152572c191737a7f3ec124660961b6de9f4eca58e87
font_01_sfnt_off00005d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 9628 bytes
SHA-256: 7f63c94a409da890b97e3cc49677ce93c4ccad9cd16de0926d1172f57e876858

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