Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e4d77a118aefae…

MALICIOUS

PDF

38.3 KB Created: 2020-08-12 13:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3159387cf0c676705086053d27b3c0e2 SHA-1: 41badce5cea1ad27a4d277329ffc4e7219a6d2de SHA-256: 66e4d77a118aefaec617634fc7b2fff55bbd97c01a5c58843ffdf26add1d2522
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, many of which are hosted on domains associated with SEO link farms and redirector infrastructure. The primary redirector URL, "https://ttraff.com/pify?keyword=neela+bakore+biology+notes+pdf+free+download", is designed to mimic a legitimate download link for academic material, likely to trick users into clicking and being redirected to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/pify?keyword=neela+bakore+biology+notes+pdf+free+download In PDF document text
    • http://files.anniesresalefortheworld.org/uploads/1/3/2/6/132682335/jadeginududi.pdfIn PDF document text
    • http://luvisob.ruthartistrydecor.com/uploads/1/3/1/4/131454859/fuxegitug.pdfIn PDF document text
    • http://files.atlantadentalanesthesia.com/uploads/1/3/1/4/131455883/najikenusapijevofifu.pdfIn PDF document text
    • http://puzezaxif.culturempls.com/uploads/1/3/1/4/131454106/xilumawudozada.pdfIn PDF document text
    • http://files.risingtimes.info/uploads/1/3/2/6/132696304/42ba0badee5.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://cdn.shopify.com/s/files/1/0431/9703/8756/files/96470388942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/15495355874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/sense_and_antisense_strands_of_dna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/xuxokebisezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/67749573444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/74694215427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/binomios_con_termino_comun_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/38829612849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/atos_dos_apstolos_estudo_bblico_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/98161460632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5555/4470/files/ielts_readings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/12257026579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/81019243784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0960/files/zadulidokelozenofalusaso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C13 5364 bytes
SHA-256: 987ffbec58d600b26bf7b8cf2c834f7d05b6d7b6543f877fd7fa9bde4c039e34
font_01_sfnt_off00005e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E73 9268 bytes
SHA-256: 478d407309bdb3c517f7f17bb66134853c2a86a0e6d8d0dce81ae6f9cafada2c
font_02_sfnt_off00007dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3