Malicious PDF — malware analysis report

Static analysis result for SHA-256 640da6c16ab01b2e…

MALICIOUS

PDF

59.4 KB Created: 2020-11-04 14:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9fbce598b75415144cbe437254a80331 SHA-1: 147507493297a75828842989dee9d91faf3864c5 SHA-256: 640da6c16ab01b2ed801422a10d157b106041c5aad4b4f5bd4ac16dc8ad74fd9
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.link/123?keyword=how+did+dictatorship+start+ww2 In PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/23e5320da44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f872d4c4bca5.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/gidonef.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/mibojos.pdfIn PDF document text
    • https://lizotolagodega.weebly.com/uploads/1/3/4/4/134495854/simetuwazedokote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e869b668-a149-4340-a54e-879d1774380f/79145804695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d4b1e9-95f4-4af2-a0cb-72ef4f435f29/dall_miles_cables_surgical_technique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c46883f-ccca-4e6f-9b6e-76f4434908cd/classic_philosophical_questions_14th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fef59fb-3336-40b7-84bb-59b2d27a4d35/ratoraferejegajaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e748ceca-1f67-4980-8e79-5e43c22477b3/bogutuza.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/xusuzekidisatarelutejux.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FD 12836 bytes
SHA-256: 13a1ff876ac820cd162a14e613bb8a4bc5c7cf830621cb78a6d354f0bb7fc7ae
font_01_sfnt_off00009c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6C 4876 bytes
SHA-256: 44de74312e080122830731d5808dfa43c756a149dfd0d80359c4c541ea082f16
font_02_sfnt_off0000ad1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1D 11160 bytes
SHA-256: 7267b7231dd27ade9e84b363a617c22df7215c843dfbd29e02131bc493fe88cf
font_03_sfnt_off0000d229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD229 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.