Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c04ff390aad218…

MALICIOUS

PDF

39.2 KB Created: 2020-08-17 05:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5d161cd29f65a239f2e186816653110 SHA-1: 4209df8d9838a4656371b1e5faafbbc7ccb068cd SHA-256: 90c04ff390aad2187334f8b480b6341abc9ea2fa1931aec085db5096d947fe25
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One prominent link, 'https://ttraff.cc/pify?keyword=cup+holders+for+manual+wheelchairs', points to a known malicious redirector. The document body, though partially obfuscated, also contains this URL and other PDF links, suggesting a lure to external malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=cup+holders+for+manual+wheelchairs In PDF document text
    • http://bagepas.kavachikavachi.com/uploads/1/3/1/0/131071164/2355265.pdfIn PDF document text
    • http://files.steinhausbernese.com/uploads/1/3/1/8/131856071/143350.pdfIn PDF document text
    • http://files.mayfieldwomensclubofwc.org/uploads/1/3/1/0/131070625/kidatixuganegopugeko.pdfIn PDF document text
    • http://refuzixu.thesciencelady.co.uk/uploads/1/3/1/6/131606490/9564159.pdfIn PDF document text
    • http://files.medicinalrootsmagazine.com/uploads/1/3/2/6/132695339/726c76.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/1/0435/5594/6645/files/mawaluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/79765962225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/tipos_de_antimicoticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6485/2634/files/54967640755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/nokapedumunivigoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/square_d_heater_charts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3645/0717/files/anualidades_diferidas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/nedube.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_off000052ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EC 5392 bytes
SHA-256: f7b83f4e79277cc99c4012887ef19ce2e44d5af6391b7d287b693b6d775f56e1
font_01_sfnt_off00006531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 13668 bytes
SHA-256: 2aeb90339a99d5b442c601872063008aafb0dc44eb44fd99214aba1e8b737d47

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