Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fdcda37a8a12f7…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 01:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d9646782d146fb721e664ff585fa3329 SHA-1: a775a902d433fa76ae0c2d0575efcf0f937c0dd1 SHA-256: f0fdcda37a8a12f73bae1a148d4dcebf646322a6fc8dc50df6610304bd519030
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=gabriel%2527+s+oboe+flute+sheet+music, which is likely used to redirect users to a malicious site. The presence of a large number of external PDF links further supports the attack pattern of a link farm designed for malicious redirection.

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=gabriel%2527+s+oboe+flute+sheet+music In PDF document text
    • http://files.twelvelittletales.com/uploads/1/3/1/6/131606343/kowezomelo_tometunor_fuzusularelijo.pdfIn PDF document text
    • http://files.iluvmemore.com/uploads/1/3/2/3/132302815/ea158.pdfIn PDF document text
    • http://vixiradiz.animalmagicminizoo.com/uploads/1/3/0/7/130775934/salalinesolobu.pdfIn PDF document text
    • https://creativecommoIn 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/1/0429/2047/6828/files/26420898082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/54559917792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6081/3215/files/64147742592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4536/2591/files/autocad_civil_3d_drawings_for_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/vimijixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/suruzirikeva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/ashrae_standard_90._1_si.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/91599378234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/josawuganif.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_off00005250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5250 5328 bytes
SHA-256: 5979552d7fd782509d4b24e5a436016ceb085a1f38e0fc0e64f686b9ca13b05b
font_01_sfnt_off00006457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6457 15920 bytes
SHA-256: 9675c2a9378c867bdf9f0e22993961e7dc8adccd6ce3f7f14cf62ba0da915baa

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