Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb64023c6cdfbb0…

MALICIOUS

PDF

44.4 KB Created: 2020-10-25 04:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 509662e1937524cecba1167cfd0ca5a1 SHA-1: 879243c49b8a7d31e2758eea1594cae91aa2cfba SHA-256: 5cb64023c6cdfbb0ff5358041ca4b27b153c315be2bfdb974488dad5716a2749
182 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a known malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to potentially harmful sites, possibly for SEO manipulation or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/pify?keyword=11th+chemistry+practical+book+pdf+state+board In PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/ruzupaxawija.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9559953.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/bf2d07f58.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/puwafewisuxukapo.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/16e3c.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/3309024.pdfIn PDF document text
    • https://kagadema.weebly.com/uploads/1/3/4/4/134456650/3962734.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/8375737ac.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/gufovuxalezoxa-dokavipem-rufibaposisaji-wujubudadewuzur.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/8555ed67805d3.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/mulogivolebegamilikezow.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tally_receipt_voucher_format.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/pebokuwoliwigo.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/fisica_para_ciencia_y_tecnologia_tipler_mosca.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/85120125061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f8b9d5864621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f872f3e466de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f8cff54af290.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea52e39-1421-453c-ba8b-01ea0516d077/kegafepozolurazixalurozix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96039cfd-a4e1-49af-ae73-7930de045662/lifedokijiwanik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b4c2e9-a76d-4046-b9f2-87935b2762a0/84980147938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b0d5246-157b-485b-a1b9-70f154daa6ff/arma_3_rebreather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be17e237-b0bf-4988-99a2-754cb946caa1/kexosuxutevunomepuwakejor.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: f-static.net 7 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 5656 bytes
SHA-256: 446f071ea63fdc370937638330c955b1c81c74fadc846ad042fa70a0a84bebac
font_01_sfnt_off00007d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1C 10616 bytes
SHA-256: b60ab4404f89b97d3eb7157d4efc7d17eb729e2d4255255c3b75d697c17eeb6f