Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2483b84135ca30b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 11:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86f9ed30e6d267ffc9b070773571cc70 SHA-1: 7ed83e3561cc999068515ba3f8384469c7ef22d9 SHA-256: c2483b84135ca30ba511948a2a7d5795fe540d4c27bd57a73cbd6d1a53a985db
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=best+books+of+all+time+pdf, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains this URL, reinforcing its role in the attack. The file was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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.cc/pify?keyword=best+books+of+all+time+pdf In PDF document text
    • http://files.bamboolearners.com/uploads/1/3/1/6/131606256/b9d05f0b185252.pdfIn PDF document text
    • http://files.mechanismus.net/uploads/1/3/0/7/130775539/9b703359.pdfIn PDF document text
    • http://files.relentlessbydasani.com/uploads/1/3/0/8/130814043/8049384.pdfIn PDF document text
    • http://files.santosayogaandhealth.com/uploads/1/3/0/7/130775382/lawosolag.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/1/0428/9835/8432/files/11067845032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/blank_risk_assessment_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5572/6238/files/70275525546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5684/0350/files/lutug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5308/0985/files/bogit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/artificial_neural_network_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/kegalegudij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/yeah_yeah_yeahs_maps_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/50280507564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/nazugagikad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5489/1161/files/nero_welcome_reality.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 5

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_off000061a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A9 5344 bytes
SHA-256: f35ed303a647a1b5c947c25fc6a072b842539092b8fca368ddaac0e328acba4f
font_01_sfnt_off000073ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CA 10232 bytes
SHA-256: d3ff286903e509f2f9bf97715cfeba9550acbeb11e77885a8518ea6336eb64d5

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