Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f6b7b03311813e…

MALICIOUS

PDF

75.0 KB Created: 2020-10-26 13:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b792b092a53b0506ac7b9a66eabdbe19 SHA-1: 13cff276c55c24dcdd52e59a47ae9a40e84d6921 SHA-256: 95f6b7b03311813e9893730414abfda42ec233f311c38b23285a57ed493848a0
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent link, 'https://cctraff.ru/aws?keyword=autobiography+books+in+english+pdf', is identified as a malicious redirector. The document's content and structure strongly indicate an attempt to drive traffic to potentially harmful websites.

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=autobiography+books+in+english+pdf
    • https://mawoluji.weebly.com/uploads/1/3/4/2/134265904/9117862.pdf
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdf
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdf
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/0e81a5aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/07f14d22-326c-4201-8d02-5d124a632631/56227988694.pdf
    • https://uploads.strikinglycdn.com/files/7a914d9d-2a4e-4ad8-af2c-8cca43cbf374/zosupigavuwidudepukufab.pdf
    • https://uploads.strikinglycdn.com/files/ff568d44-4d6a-4596-8c47-b94ec561a84a/download_playboi_carti_shoota.pdf
    • https://uploads.strikinglycdn.com/files/17171585-76cc-47c1-b2b2-e1ea16822f41/nalomedobojokuriji.pdf
    • https://uploads.strikinglycdn.com/files/5b49bcbb-04c3-40d4-ade1-6413a99eee80/dauntless_hammer_stagger_guide.pdf
    • https://s3.amazonaws.com/votubukaxogilix/tokowumegug.pdf
    • https://s3.amazonaws.com/sowewazulejewi/xelavupemimosek.pdf
    • https://uploads.strikinglycdn.com/files/04a60116-b92a-4faf-b1e1-dbaa3af20748/pulp_charles_bukowski_epub_download.pdf
    • https://uploads.strikinglycdn.com/files/238de471-1f20-4675-8b28-daf8a0331d0f/fina_logo_download.pdf
    • https://uploads.strikinglycdn.com/files/712b220b-a211-4775-a0cb-fb81a0e020b2/gilomutimasorepetojenekik.pdf
    • https://uploads.strikinglycdn.com/files/cafde1a0-1452-49d8-9bd5-2c2c67cfeafc/77008571027.pdf
    • https://uploads.strikinglycdn.com/files/9f3ab4cf-fbd7-4c11-b667-82f008cf4ccd/fipak.pdf
    • https://uploads.strikinglycdn.com/files/d684583c-1f1c-4131-93a8-60f4d0567818/sally_mann_hold_still.pdf
    • https://uploads.strikinglycdn.com/files/0b1cedde-fae6-4b10-b496-2f1395e01597/92433821844.pdf
    • https://uploads.strikinglycdn.com/files/19ad6379-f3ff-4283-8d54-f50e1d4e5cc8/wedujojudukudufer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c4.bin
743ffbb201a3f435d7382638e3afd30b64338d971b2715eebdcb0f20d4c42d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C4 5600 bytes
font_01_sfnt_off0000eac8.bin
ace3fbbfcf965b94e2f6166b7a2d865eb7eb83cd14be88eea95492e687de13e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 17656 bytes

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