Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d935476e36de544…

MALICIOUS

PDF

108.2 KB Created: 2020-11-02 18:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa8f0dca8f9d1079cfa12e2bf17195a0 SHA-1: d6d97b731f1cc2e0114a6922680f1d17946eb5f8 SHA-256: 3d935476e36de544bde2c3f4476eaf1474bcefa17443c2ed540aa47ad5064ab6
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://ttraff.me/123?keyword=microsoft+outlook+365+login+email In PDF document text
    • https://forovaze.weebly.com/uploads/1/3/4/3/134315943/db98966a667c0c.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/2855382.pdfIn PDF document text
    • https://pufotawimudob.weebly.com/uploads/1/3/4/3/134380049/gupuxolip-sokozimadofaj-muvosun-wupijebawunakot.pdfIn PDF document text
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/gepofo.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/8cae26ad-f27a-4019-8428-b4bc2840dba6/38163805120.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/swarovski_crystal_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8c4d95-f29b-4202-830c-7653de824a5d/dekixoxeposotatu.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/84598540097.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/company_meaning_and_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/aqualung_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fcf8316-820b-4629-b8c9-b36c762e58c3/titoturebalirifafolipew.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/20436130198.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15924 2888 bytes
SHA-256: a34f6133241b0e53c3cfe1f853016e916a3d7180b6d3b88390408fd04f35e9f6
font_01_sfnt_off00016368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16368 5712 bytes
SHA-256: 3a7b54883b2e31351b4ba1556ee479057412afa53ffb14f27fb9b5fbe96e239e
font_02_sfnt_off000176d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176D7 13032 bytes
SHA-256: 948c0ccca739cfda447d2e5a3ff5f7fc7ec890c6f893f61f0fd68486eb81fbc9

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