Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d56562059c4a9d6…

MALICIOUS

PDF

43.9 KB Created: 2020-08-04 21:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 766a2fb766aff039ce4d5b4bccfce8a0 SHA-1: c223cfde981012bd5e31e1eb24e09a6178da2e86 SHA-256: 2d56562059c4a9d636a487865c1579e5af0d65148a8d513bde56666574924a34
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body itself is heavily obfuscated but contains references to the malicious URL and other PDF links. This suggests the document is part of a link farm or SEO manipulation scheme, likely intended to distribute malicious content or phish users.

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/wb?keyword=agustin%20etchebarne%20libros%20pdf In PDF document text
    • http://files.thebeautybarracuda.com/uploads/1/3/0/7/130739163/runobabadi_lujazuxexilere_labolakarenev.pdfIn PDF document text
    • http://files.vietnamcafesandwich.com/uploads/1/3/2/6/132682142/594084.pdfIn PDF document text
    • http://files.aasca.org/uploads/1/3/1/8/131856636/bubitu-fikaxerovuta-soratofiponodo-suwewosodufosu.pdfIn PDF document text
    • http://files.dustinmarquel.com/uploads/1/3/2/6/132683330/4344226.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/1/0428/3976/9254/files/warframe_beginners_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/805943690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/fuwuledumusanagesik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/89805388826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0836/8545/files/union_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/dezaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/arthashastra_in_kannada_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4169/2580/files/rip_stands_for.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/sogewukavewezogap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/diabolik_lovers_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53975554289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/29462549456.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_off00006a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7B 5544 bytes
SHA-256: 8f8f348b317b5e6b6704c2e55d85838b011e1e0c77d2f8e5018c441cdcb805b9
font_01_sfnt_off00007d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D53 10596 bytes
SHA-256: acf36bb031757b0943ea89d77983c03ab98fadf839d47d1efc59606d32dfe4df

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