Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec9f869fead55f1…

MALICIOUS

PDF

35.7 KB Created: 2020-08-24 22:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7180faa1eb997f90a3758f54fd0752df SHA-1: 347fc4ee9f7845a56af0d775a101fc093c672692 SHA-256: dec9f869fead55f1e7e439ebda4905a7462b3b7a7146469fc7d32410131fcf2e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a malicious redirector link disguised with keywords related to 'Avast premier 2018', aiming to trick users into clicking it. The document body, though heavily obfuscated, contains the malicious URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm or redirection strategy. The presence of a malicious redirector link and the mass external PDF link farm heuristic strongly indicate a phishing or malware distribution attempt.

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=avast+premier+2018 In PDF document text
    • http://files.anteupphotography.co.uk/uploads/1/3/0/8/130874317/233109.pdfIn PDF document text
    • http://files.zionmarietta.org/uploads/1/3/1/4/131408854/wugava-wudakezevujalog-xogarudetagikej-terosibe.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/1/0431/7744/3483/files/korutezejilobilaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xomekanob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/high_voltage_testing_of_transformer_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/ejercicios_alfabeto_griego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/lemof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/34576222644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/chemistry_of_actinides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9612/1248/files/infinitive_of_purpose_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0926/0958/files/90649916468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/the_constitution_42nd_amendment_act_1976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/anita_brookner_hotel_du_lac.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 3

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_off00004da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA4 5504 bytes
SHA-256: 51d17879a3d15983e232ef845a9c92db24ecacfa6459bc6dc45f51cdb2105c59
font_01_sfnt_off0000604d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604D 10044 bytes
SHA-256: f1fa250527cc0ee9d89bfa6679abac719f3fb43b040cd11aebd825a72fe95aac

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