Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1304538a681fcb…

MALICIOUS

PDF

40.2 KB Created: 2020-10-31 06:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 562320c1b722274ffd70500d02dd4b72 SHA-1: 9807721fe1ded9146944cc0ee686e6e5497cc027 SHA-256: 6b1304538a681fcb0731c683403fc56241e88a9f9eb54eb9d65bfaf32c70d6bf
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://cctraff.ru/aws?keyword=pampered+chef+pizza+stone+broke In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f8d438f4635e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5f929cbcd8955.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/xofapasol_tuwarifozes.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/9620789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5f9527f6b336b.pdfIn PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/wopopoxinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5f9ca590e68d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_5f9c52176977f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f90b6bb3a494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f9297c479e91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/68096882592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f3295ce-5713-4fae-ab7f-84f26a124961/domipomazonosad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be56ce06-da59-41e8-b95c-f53836dd56c6/92884082320.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_off00005c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C59 5620 bytes
SHA-256: fbe1147984fdb20f82e99b720d6fc3dcd4f1dd8779504a730d8bcf4123645462
font_01_sfnt_off00006f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 10844 bytes
SHA-256: f65e7e87c2f76d5217745a6414195f4a539eae98c19f2f7f07022d3889d6a4d1

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