Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad51a272d9a4a25…

MALICIOUS

PDF

47.0 KB Created: 2020-11-01 11:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7968215f9084060608ccb1aa18c3cdab SHA-1: d937fe312e409061e70580086e738748d77c961b SHA-256: cad51a272d9a4a2560e408028a644d1419786235719883af271bbd74e2c45f5a
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a remote-support lure. 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 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=kodi+android+how+to+access+network+drive In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f90aaba99269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f9164d17b604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5f9994ec9d756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_5f993f3ca3e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f875d40d5d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f94357b5861a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f8fdb041898c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuzed/todajuwimekuzagumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/pre_execute_and_post_execute_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/78764458036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524b2930-ab5d-4a2b-933a-22795e90a881/38329658690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/phenotype_and_genotype_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f413d8f-fe99-4b88-9880-7d2ff1c3f0d8/gagoz.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 5180 bytes
SHA-256: 8d5fa66d44c7e687724df08b31dcb090fd48c5367a52f9cafed5d06d084d4e44
font_01_sfnt_off00008aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA8 10696 bytes
SHA-256: fafdfef8a8fece254ea7a53e6187b3a39a29b6a779149b502b5753930c7e63c1

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