Malicious PDF — malware analysis report

Static analysis result for SHA-256 9687ed68a81dd5ef…

MALICIOUS

PDF

35.3 KB Created: 2020-08-04 09:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0fb31b54db47b960a91da34f15161c5 SHA-1: 543c25c32afe6ec985a5c4ce15bef3f9566df6a8 SHA-256: 9687ed68a81dd5ef2ccb67a17a56fb1b4265cb24ac3f182f1f9c086585ef5aa2
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or spamming operation. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that is also flagged by the heuristics, reinforcing the malicious intent.

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=green%20day%20american%20idiot%20songbook%20pdf In PDF document text
    • http://files.canyoncitygrill.com/uploads/1/3/1/4/131407459/719052.pdfIn PDF document text
    • http://files.greenrootsgourmet.com/uploads/1/3/1/4/131453588/26d064099ed1a50.pdfIn PDF document text
    • http://files.saintmichaelscemetery.org/uploads/1/3/0/7/130739204/silawofagir_zarijimes_guxikitiwom.pdfIn PDF document text
    • http://files.nextgenrugcleaning.com/uploads/1/3/0/7/130740522/masaweriligo.pdfIn PDF document text
    • http://files.peezda.com/uploads/1/3/1/4/131408954/gulusunamubax_rimov_bixavedu.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/1/0434/9270/4408/files/lenugikorigerutuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/xowikopudupisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/zuxibedupulivami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/70636735979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/appendiceal_mass_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/lawokapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/61874280230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/58623261293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulifagavukaxubodipiripu.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_off00004945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4945 5780 bytes
SHA-256: da4785d4a008324d81e0f1c63ad8141f9a76d4d938b4bd5c36d2ba2c344bca06
font_01_sfnt_off00005cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEA 10332 bytes
SHA-256: 1887ab82a3e33193dc2fca06a91fe4c2e22a494aa77f2f4d37ab29eb0886af37

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