Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99887952390ca19…

MALICIOUS

PDF

42.9 KB Created: 2020-10-27 08:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6592fd0ca16e4e169e9b5c7a66c406ba SHA-1: e1801085b9570098f3662ed6f648895af8199c59 SHA-256: e99887952390ca1974f54f0e1b7e4ce86e3e6b59aefee43907548db3ab00a268
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/pify?keyword=annie+jr+main+characters In PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/welusazefan.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/4547758.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/102ff498-f866-40cb-aad8-3fc6a3242517/53087119663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562c4674-75a2-4943-8b53-e0efe97e38fc/71783510564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343e8f17-042d-4a54-b666-04549417d968/90845542082.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/18310913410.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/23616185920.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/37722358774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f4f59e5-e196-461c-b998-283d15dd600e/18024884711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2188bd80-28b0-4224-a8e2-fbfe2d2ff8f5/pekivedobebeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4456/8989/files/baracuda_escort_agency_london_hotel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5255/6184/files/27807444273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc837af-5e17-4e05-901e-cf9778128ef0/78156329995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a39e4e9-3520-4fb8-8047-daf7c9709dee/53342001998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d915cf60-a580-489f-ab5a-1c414d1dddf8/67083144320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad91b17a-c6b3-4a41-ba03-c46359b56ba7/adb_android_reboot_commands.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_off000068d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D9 5072 bytes
SHA-256: c96748e21e6646683755bf16e5bdc7bacc62dc40dd6881e618c5f764bc486471
font_01_sfnt_off000079e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E1 10984 bytes
SHA-256: b00a29b866cc6b072248036352a7d57644924f209bef291dc382b6eaf2c5abed

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