Malicious PDF — malware analysis report

Static analysis result for SHA-256 c016f54fdc5202f2…

MALICIOUS

PDF

35.2 KB Created: 2020-08-01 00:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f63d52cc8af27f8ea286799d19c5b812 SHA-1: e7e100799a265fb834f834b667fb5311baa0ee86 SHA-256: c016f54fdc5202f2e8d724c03353e7b06fbdd15f855c035fa1cd49a8a78df6f2
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is associated with a lure for 'Melodyne download free'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same 'Melodyne download free' lure and the malicious URL.

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=melodyne+download+free In PDF document text
    • http://files.heidiaphroditejewelry.com/uploads/1/3/0/7/130739831/vaxuvadofux.pdfIn PDF document text
    • http://files.ashleighnicoleevents.com/uploads/1/3/0/7/130775866/powotiz-vedetatevemet.pdfIn PDF document text
    • http://files.wrecklessericpaintings.com/uploads/1/3/1/4/131406892/fopiga-zijifuvizewaweb-tutomunaxev-nilofikilovemi.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/1/0428/2561/3475/files/metuxolepuzur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/desokewukazoxipobed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/fozunatokow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/gepotiginivifowetem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/tabakipasebojidamerosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/24037520971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/77163373262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/5819496134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/39257902158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/difimirevakinedifujudejaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/zaxomuveminaju.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 6

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_off00004cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAD 4920 bytes
SHA-256: 1f1b1b83f26710fbf00a31ea7f5d198f1b62cccfc87b4294283c9ee8e3388032
font_01_sfnt_off00005d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9B 10220 bytes
SHA-256: dfc3077e8aeb7484de806c6cb1ed052ef6aa7e7cc1bbec4ee1c366fe35d5dcc2

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