Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd76c90bb72c6587…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 04:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b75da61ca465093e03cc1a265acd9000 SHA-1: 6152b46141fd202fba2b5b5e6f7d16b5aab8d7ad SHA-256: dd76c90bb72c65871fff28bce9a2be7dde6b1de845ca48119c71612bf3ddd20b
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.com/pify?keyword=sleep+apnea+guidelines+2018' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links pointing to external resources, primarily hosted on Shopify, suggesting a coordinated effort to distribute malicious content through a link farm.

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.com/pify?keyword=sleep+apnea+guidelines+2018 In PDF document text
    • http://ruxes.stephanieclaus.com/uploads/1/3/1/8/131872269/2767990.pdfIn PDF document text
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdfIn PDF document text
    • http://files.ganikowskij.com/uploads/1/3/0/7/130775084/8734867.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/1/0436/7345/2697/files/mirekedorojomef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/42595052350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/marul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/british_english_american_english_tnpsc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/gubumuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/solojob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/jutomabezijololuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/36541918116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/64651490555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/sigosajebatubimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/jukonafidabewofipekejil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/jivewewamekebamavuwojerog.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_off0000681c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681C 5656 bytes
SHA-256: 462d801ff7bf35a84544ebd4a3afc504bdc6c1fd2e02438c1518f079d445a229
font_01_sfnt_off00007b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6A 10252 bytes
SHA-256: 119733ec2f194cebac295298c9644d6fdefa3f4903d5c8149489345a551aa1f8

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