Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3885af0399759a7…

MALICIOUS

PDF

35.7 KB Created: 2020-08-07 21:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15909b84888d2ed496417a5876fb799e SHA-1: 6e408e4f427ea2ec50b20a51548e1c44495c3e6c SHA-256: c3885af0399759a7c17a4d65a1ae901516de3b2f59aafca419ebe9e4dbb7b816
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as educational resources, but they redirect to a malicious infrastructure at 'ttraff.com'. This SEO-based link farm technique is commonly used to disguise malicious redirects as legitimate content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=cambridge+checkpoint+science+workbook+9+teacher+s+resource+pdf In PDF document text
    • http://files.shearserenitysalon.com/uploads/1/3/1/3/131383553/53b9878d6b0f11.pdfIn PDF document text
    • http://xelodaso.missniquecshoetique.com/uploads/1/3/1/3/131383297/cf45289a21.pdfIn PDF document text
    • http://files.iyengaryogaojai.com/uploads/1/3/2/3/132303270/8fc3f7e867b0.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/1/0437/4455/9258/files/jukepuboluxisupovixeseka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/72452400675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/7498684599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8685/5844/files/bijuvegij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/damufezeloge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0603/3052/files/woocommerce_remove_product_count.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/fuzedaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/podanozikobiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3741/5831/files/77647273641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/42540620591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0490/2045/files/20666045766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/applied_mathematics_1_mumbai_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/wuxivajiliderivukimeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6695/7722/files/xonexiru.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_off00004c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6B 5892 bytes
SHA-256: e1fee5e59ebad67b1b2b47446ca447b27fc3bedf97fe3a2563803c57ae4a7351
font_01_sfnt_off00006053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 9688 bytes
SHA-256: e62460352f1430508a0188a002298f2158e6cc6a704a50a8960dceddc4edff45

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