Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb58bf534178c00…

MALICIOUS

PDF

43.8 KB Created: 2020-11-04 10:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2a0281d606408a4d4fe9abb710e15cf SHA-1: dd1b763aa1bad46317a90ef45d496ed150de60d5 SHA-256: adb58bf534178c0098ba747ee31465f8218c157dae456f80f4f9ba9e356849b1
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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, routes users through malicious redirector infrastructure and presents a deceptive download button. 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/123?keyword=hay+day+app+download+for+pc In PDF document text
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/8b3400b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f95acb2e9a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5f8c8ee488a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f89e5bf2af6b.pdfIn PDF document text
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/5337224.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/viboxikuz/superman_escape_from_krypton_six_flags.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9b4f2f-9ef5-4ce7-ab38-2d6154132cd8/thea_the_awakening_crafting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4f7eaf-9a02-4bd1-8559-3eb496fcbb0d/tozutetewofukisiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/77184959646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8050e58-c3b5-4246-a5c8-91f18817963e/venowexelopetapiju.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/doxifaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5bfea54-06ec-47ea-b62e-7bd6a8c3021b/65285021972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cefcb687-96e0-4cac-991f-f8ff462d09b5/papoleratak.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 8

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_off00006c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C67 5124 bytes
SHA-256: b1528fcce26bc2b283d6e04f900002b194813b98f7c8337611b2f7716cb5adb8
font_01_sfnt_off00007e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E03 10716 bytes
SHA-256: fd5cb76a3b05e617d3c52e874a912ab7f6effd8b4ba07e06243197499a800dd2

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