Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8bd80a3c5e34bf…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 05:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cde91e4efdc43e490d24c42efda035b6 SHA-1: c7f8e745e22105e4556cd55944f41be149a93686 SHA-256: de8bd80a3c5e34bf20545609679730359470b779910b0b5e8ce8a7448f74366d
214 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a guitar playing tutorial, aiming to lure users to malicious infrastructure. It also exhibits characteristics of a link farm, with numerous embedded links to external PDFs. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of a callback phishing lure further supports the malicious intent.

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=noad+solo+guitar+playing+pdf In PDF document text
    • http://files.rosaleeinteriors.com/uploads/1/3/0/7/130775607/gobazutarunefuded.pdfIn PDF document text
    • http://memorag.joesfinecoffee.com/uploads/1/3/1/4/131406717/minigutofufunes-luzisolanozesi.pdfIn PDF document text
    • http://files.gentlemencallers.com/uploads/1/3/0/7/130739116/4457202.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/1/0433/6225/5013/files/58148315707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3516/2784/files/15501119993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/80379287855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/astronomy_magazine_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/aptis_writing_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/vilepugorig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/53999471274.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/59449965251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/67052810408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/76426100154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/15819638416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/comment_fusionner_plusieurs_fichiers_en_un_seul_fichier.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 2

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_off00005f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 5280 bytes
SHA-256: 6a52e555787738666a373b866c7c77b1549fe3732bd1ebe5260950d426880875
font_01_sfnt_off0000714a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 10444 bytes
SHA-256: 04505f5724cc85d06c1270699754b53901410d80fa84800e475c6b919bdf8125

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