Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c23394926889e74…

MALICIOUS

PDF

48.0 KB Created: 2020-07-27 21:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 593352326db4dd18f23103c87909aaba SHA-1: 000ad506c528b08e79c048294bfaf1b7bfb3585b SHA-256: 5c23394926889e747453a5cad96b7d92c3fdf4f1c058addd4cfcf1eca352b0e3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links pointing to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, appears to contain keywords related to software downloads, suggesting a phishing or malware distribution lure. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=bluestacks+app+for+android+phone In PDF document text
    • http://files.macsmosaics.co.nz/uploads/1/3/1/4/131437491/7886301.pdfIn PDF document text
    • http://files.electrolysisandco.com/uploads/1/3/1/4/131483154/zolodededemutirop.pdfIn PDF document text
    • http://files.revronnie.net/uploads/1/3/2/7/132712214/guzudabigivod.pdfIn PDF document text
    • http://files.diyprojectnest.com/uploads/1/3/1/3/131380029/lonatekuxom.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/1/0430/7045/5965/files/46400772186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8377/5643/files/loxesot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/pazibofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/ledev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/jibupupuxenasiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/kaxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/zigalurijojidusefeduba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/28015499388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/filoviletig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/gusoripelipibadawe.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 8

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_off00007dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 5236 bytes
SHA-256: 9368ee8619632fa432a9bfe71af21c7cb159e974fedf727cb4a9b2a0a3296591
font_01_sfnt_off00008f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F80 10392 bytes
SHA-256: 895562be90726de8f9100f16e7bd549748027a7ae991d800ec65ad631fdea401

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