Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cc64a99aab0a6f…

MALICIOUS

PDF

45.8 KB Created: 2020-08-24 05:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d52d5a05cad422cbba987eea06c8e741 SHA-1: c8c6ebc9352f559b72ec2bc689dace6c7c971aa1 SHA-256: 37cc64a99aab0a6f670f812f2da898c872cd851b7c983322d44b555bbee8efb8
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with several links pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=animation+composer+kuyhaa. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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=animation+composer+kuyhaa In PDF document text
    • http://zevafuki.statusnovi.org/uploads/1/3/0/7/130739826/3811351.pdfIn PDF document text
    • http://files.southingtonrepublicans.net/uploads/1/3/1/6/131607029/bc0803de105.pdfIn PDF document text
    • http://files.bezosbe.com/uploads/1/3/1/4/131437223/zazorikasevujaj-nazarunat.pdfIn PDF document text
    • http://nububo.littlebluebowphotography.com/uploads/1/3/1/3/131380213/21cd5293.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/1/0429/3967/8886/files/davafixuxonebuvelowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9750/5435/files/tamilrockers_amman_video_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8681/5139/files/tekel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/85433220273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/28694375506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/tenor_banjo_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/rutajeziwixaburotulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/49351694011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/frog_dissector._exe_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/budget_2020_highlights_pib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7994/8695/files/ibm_dfsort.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_off000075a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A3 5296 bytes
SHA-256: 3e54f853bf7820208d4c98a779761e6a3172dd8e346cc27eec578e855fd4c4d9
font_01_sfnt_off00008775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8775 10132 bytes
SHA-256: 6d578295aee10451ad2fce569635ee4067b04da3847ac0cd5ba1cb1fe16e79e2

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