Malicious PDF — malware analysis report

Static analysis result for SHA-256 a593d592efff63e2…

MALICIOUS

PDF

61.7 KB Created: 2020-11-06 21:35:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fa143aa33b68b67dfd1af309755a4c17 SHA-1: eef19f8abd946d8dc01d65f84408c71d6234df78 SHA-256: a593d592efff63e2b69d75146b21ba03e45b2857811d2b108a875df59e385e70
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, with a critical heuristic identifying a link to known malicious redirector infrastructure at `https://traffine.ru/aws?keyword=minecraft+apk+download+ac+market`. Another heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results. The presence of a visual download button lure further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=minecraft+apk+download+ac+market In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f8d32b70c3e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73bd8c06-87c0-41c8-b1cc-ec5c7a9c232e/tatsunoko_vs._capcom_ultimate_all-stars_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7a75db-19b2-40db-b544-31ae3e1a2826/81819228244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4002b634-6010-4be7-b89b-183025b68d35/when_to_use_subsequently_in_a_sentence.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/when_are_old_testament_saints_resurrected.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da5721f-6ec2-46a4-a376-8ee6c578997e/xixuwoguwa.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/67428969028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996ebdcf-b7ce-4d99-994a-6078f89a5e4b/77835155276.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/24277892006.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/see_it_bigger_planner_2019_2020_refill.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_off0000b415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB415 5284 bytes
SHA-256: 626399a9d887da008411424bf3ad2cd44007ee8e46f82ab631aa032731b53cdf
font_01_sfnt_off0000c61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61D 10568 bytes
SHA-256: acb42a277044a37c559d4944d27ba175b6574a1cb67160252f1fb0f30c5fb68b

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