Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff837d35ebf3b664…

MALICIOUS

PDF

34.8 KB Created: 2020-08-28 02:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d2ffb1a54b42e099aa999645135acea SHA-1: d3a2ec6fc4e26ed7344450a5b0c3bb03b177d664 SHA-256: ff837d35ebf3b6648fa0dbea425e83fa4eca19d55ed76b284f06c7d4d4608061
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are part of a link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=topaz+stardew+valley, which is likely used for phishing or malware delivery.

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=topaz+stardew+valley In PDF document text
    • http://files.peterthurstonclassicjaguar.co.uk/uploads/1/3/0/8/130814106/sopegijeti.pdfIn PDF document text
    • http://buwokux.ryanwesleygilreath.com/uploads/1/3/1/6/131607310/454bd65.pdfIn PDF document text
    • http://zolubi.studio6works.com/uploads/1/3/2/6/132680813/kewelabolexabekukid.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/1/0434/2854/4668/files/july_2020_calendar_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/bahishti_zewar_complete_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/kudepumumosukotililub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/aluminium_6061_t6_properties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/agriculture_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/dowaguwipukabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6993/9607/files/kuxow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/51186590733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/1664/3750/files/software_deployment_checklist_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/xaxumawejepezasepuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/zaramimuramovu.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_off00004561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4561 5208 bytes
SHA-256: 0152f3aae5837fcfe6e10f0abb0e2a53bc8dcd3e46cd1f76046027a47c2470e4
font_01_sfnt_off00005746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5746 14344 bytes
SHA-256: bd6bd0202f6740c355e49d230145ac09078a4a44d3b257bb2e00f1223da3db15

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