Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbed4c0c0179856…

MALICIOUS

PDF

35.9 KB Created: 2020-08-28 03:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7304efdeda27cc3486524365cc56d13e SHA-1: 7bda054749a16942d70c2f1d20ce2d55ce753f56 SHA-256: 4bbed4c0c01798569b22adcf12e1d5e07d4101b59e065cc5199925bda81fbe26
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used for SEO manipulation or redirecting users to malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=separadores+automaticos+quirurgicos', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify and custom domains, reinforcing the link farm and redirection attack pattern.

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=separadores+automaticos+quirurgicos In PDF document text
    • http://files.bonazah.com/uploads/1/3/1/4/131406735/3629710.pdfIn PDF document text
    • http://files.benjamincarkeyreplacement.com/uploads/1/3/0/7/130775032/510d9d.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/1/0433/8250/5637/files/barras_bravas_peru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/kosoligaraneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/3310/9156/files/allegra_180_mg_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/12355926649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4066/7808/files/43971499014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/jikakabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/pesav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/98328826088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/tobevifuwovinob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/vuxipuzokivekamalubatewe.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_off00004c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4B 5588 bytes
SHA-256: 56776b211f64e102017d70a205354af374425a69b2f739e3dc82ebcde675a60b
font_01_sfnt_off00005f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F24 10396 bytes
SHA-256: f4d9c5c317584726953f51ec9300967552e6629d21f5e316e5eb7d873bd851b7

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