Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15b18ae01ea4d33…

MALICIOUS

PDF

40.2 KB Created: 2020-08-26 22:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ace5fb11ce7e2404725a80dbd0064b62 SHA-1: e520d4e929f7ca3ec24f16358a0f01a4b7c815d3 SHA-256: d15b18ae01ea4d333f16560c505ba3dc01234f3a6ecfb2f92e657189b67e00d3
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'firmware download' and a URL that is also flagged as a malicious redirector. This suggests the document is designed to trick users into clicking the link under the guise of a software update, leading them to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=r4+upgrade+revolution+for+ds+ndsl+nds+firmware+download In PDF document text
    • http://fudipo.lawrencequill.com/uploads/1/3/1/0/131069934/1bff4c9faf22.pdfIn PDF document text
    • http://files.shopnorae.com/uploads/1/3/1/3/131379301/kixejaz-sazogoze-kimuziletowero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3388/files/anthem_of_the_seas_ship_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/negagopogazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/golongan_obat_antijamur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/83613108241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3550/8126/files/carbon_fiber_sheets_cost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/rogers_commission_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/airport_reef_bali_surf_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/tudixotuxelatovidivo.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 1

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_off00005ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE4 5608 bytes
SHA-256: f8c3c63431941e215d271a3ebc88a762831ae6ec389c1dfc330c02d37ed01dfc
font_01_sfnt_off00007004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 10588 bytes
SHA-256: 7a6f447c6dc9e73ba2f6a55057c9acbb184c33848fbb871a60db11a2163603cf

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