Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ac909a3b4ad43d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-08 22:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4f5aa30200e83d7970b5cbd3ab8806b SHA-1: 177f76899536ba70ebe6ac0f79d5e02f0e293047 SHA-256: 54ac909a3b4ad43de577f22c98401a7e4fc128601c8a983ac83b5e774dd50319
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate a PDF link farm designed to lead users to malicious infrastructure. The ML classifier also strongly flagged this document as malicious. The primary attack pattern involves luring users through a deceptive document to a malicious redirector.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.ru/pify?keyword=arabesque+no+1+pdf In PDF document text
    • http://bimim.heartofamericaherefordassociation.com/uploads/1/3/2/7/132740405/6abaedc.pdfIn PDF document text
    • http://files.michaelallensalsbury.com/uploads/1/3/0/9/130969966/6271375.pdfIn PDF document text
    • http://files.allysonparsonsart.com/uploads/1/3/1/4/131408546/6812119.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/1/0427/4218/6150/files/zinituk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/i_believe_i_can_fly_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/patofisiologi_neoplasma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3504/0664/files/vafozevane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/wumezolemukesekipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4625/3222/files/autocad_underlay_not_displaying.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/vewoxasusogepixenavotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3740/0999/files/violin_bow_making_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/borozawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/mazekodaxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/retadopipujuv.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 7

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_off0000541a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x541A 5308 bytes
SHA-256: 137538b4ef1769e9885a89fab8bf319090138a5ec3aff90b7ccbfe10c9fdc1ef
font_01_sfnt_off00006631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 14756 bytes
SHA-256: d383bb9e2f9d2189fa2cd821e9d7308dac3c8e1e7a7bb7f1582086a2e47fb433

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