Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a9f205748591d6…

MALICIOUS

PDF

40.5 KB Created: 2020-08-25 09:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bf8d66694de798191e09b32f7bf7634 SHA-1: dae2e83b904032a3cf7464821a440652a4a724ce SHA-256: 63a9f205748591d6a33390ea51c3328434c61ba4911162d0100367e3e52098cb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body and embedded links suggest a lure to download a PDF, but instead redirect to potentially harmful 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.ru/pify?keyword=flowers+for+algernon+complete+pdf In PDF document text
    • http://dukewajo.shannonsstudio.com/uploads/1/3/2/6/132683292/9128695.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/1/0436/0273/9362/files/18969340997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9303/3117/files/mupajewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/fofoxevabakituxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/dazitosubapalokakoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0590/2752/files/bootcamp_3_64_bit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/17881012951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/tututexezol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/niwezuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/63998493097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/comment_augmenter_son_taux_de_testostrone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5544/6176/files/sintesis_de_acetanilida.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_off00005fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE9 5520 bytes
SHA-256: 04cd9cbf25fe4123150b96a21ba972f2881e9b6a56f3416666de74404d7b4416
font_01_sfnt_off000072b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B1 10188 bytes
SHA-256: d808f6704278da521370d1fade6868fda462f3cd1d8faee5ccd9d73695b4ea1e

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