Malicious PDF — malware analysis report

Static analysis result for SHA-256 0923b2537bd4c7f3…

MALICIOUS

PDF

40.0 KB Created: 2020-08-18 21:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0430a1754b97491341bd7d192423c1e SHA-1: 9eb36c7d81e35d8c9da53381b508c4feec27508d SHA-256: 0923b2537bd4c7f36098e2d7af597c0fe5e03381779364c9b1a79ca5530528f4
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the primary redirector URL and references to sheet music, likely a lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to malicious infrastructure.

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=ammerland+flute+sheet+music In PDF document text
    • http://files.bluelabelproducts.net/uploads/1/3/0/8/130813841/32879ff2c68e1.pdfIn PDF document text
    • http://naluwok.camillefrancois.com/uploads/1/3/0/8/130874019/vovaweg.pdfIn PDF document text
    • http://files.fcbtlaw.com.au/uploads/1/3/1/8/131857152/pusofiwena.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/1/0438/3775/1456/files/apollo_munich_health_insurance_optima_restore_brochure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/goxokojafaxoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/31024748160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/citibank_rewards_catalogue_2020_malaysia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/bestimmte_und_unbestimmte_artikel_bungen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/tujaxamafaxixan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5205/4181/files/2007862391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5315/8298/files/xowupopexamoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6205/9427/files/85875798426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/xezinizuxegabinixujukosa.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 6

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_off000050f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50F5 5248 bytes
SHA-256: 61688b7750fa5732ead8c0877a55f57289526033c0584b5fc5439c1c6496d4fe
font_01_sfnt_off00006290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6290 15108 bytes
SHA-256: b09fcab066e39a196e2a807ca7b5d05113fc9f24e639d2b912a342a3d72cd9fd

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