Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b3dab55ebff307…

MALICIOUS

PDF

47.9 KB Created: 2020-10-27 11:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9df26de2b3e84ea363e4f404bd2c4392 SHA-1: d1808fb84f02cf9a928852aff231f7e33f16438f SHA-256: 70b3dab55ebff307bdad7c29807f0258df888816ad8f3c404efd32ba174170bb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=black+angel+trail In PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/rigoluramej_zewofiketipu.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/bimirofi.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/9019550.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/c8bbb8b48.pdfIn PDF document text
    • https://wigowaziralo.weebly.com/uploads/1/3/4/4/134498628/19a7c2f8421cf.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/4efc41e8-51c6-4b4d-93e3-7c59fa4cea19/73413975357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68afceba-7801-4685-a7ee-333c83b402ee/58371273264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48b3a22-d728-42bb-98e7-c597e7dea461/96476749522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f944826-3588-4642-a1d0-cfcdd61f83c1/61108702612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae229067-14c6-471a-b7a3-846e307c0f7d/ludofelazewetuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef01a43-ae17-47ed-9f0c-f1dffb9d900f/kugetokufobenebosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea141e5-78b3-4042-acdf-58418aeeb557/josegav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1aa6187-5568-4d83-9f4f-1f396aae277a/kipotutig.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/zuxoju.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/22163072509.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/53581415085.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/ibps_clerk_syllabus_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/50977868003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35503458-8c11-4ca8-ab2e-2facf28683b4/28203663925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48af2f1-0b1a-438a-9499-f4dc6d245e3e/gefofofuzisalujax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db71f461-e911-43d1-8487-886854c93bf4/tsuki_adventure_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dcb97a4-eddb-493a-b277-abf829c600b7/70655259561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7da398-bef1-40e3-8a78-ecfbb7bcf1eb/taferolodawezifup.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/wuwalafuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/mexivodaxij.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_off00007d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 4904 bytes
SHA-256: a221ff44396cfdcc5d0839b106a7658b153339d59c296dcf4fa559fda523881f
font_01_sfnt_off00008e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E32 10600 bytes
SHA-256: 84bb5a32f8c6d2865f6a458d6ded5c2826758b138a5043a85a78045cc71056e7

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