Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd976e51b3e8d038…

MALICIOUS

PDF

50.5 KB Created: 2020-08-07 14:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 95bd0e18d5f91852f3fe3aeb48f7c1a4 SHA-1: 6b48a143118529f75001b3586c935d0bd2925569 SHA-256: cd976e51b3e8d038f8b74fb9279fc8708f181b5cb16a6e5115dddc6e216a51b1
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 by the PDF_SEO_LINK_FARM heuristic. One of these links, https://ttraff.ru/pify?keyword=what+is+unicast+multicast+and+broadcast+in+networking+pdf, is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains what appears to be junk data, but the presence of the malicious redirector and the link farm strongly suggests a malicious intent, likely for SEO poisoning or redirecting users to malicious sites.

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=what+is+unicast+multicast+and+broadcast+in+networking+pdf In PDF document text
    • http://files.mse2opiodepidemic.com/uploads/1/3/1/4/131453718/3c70460122d7.pdfIn PDF document text
    • http://risadas.tfdonaldson.com/uploads/1/3/2/6/132682646/jajotabidajolomi.pdfIn PDF document text
    • http://files.youandyourcareer.org/uploads/1/3/0/7/130775448/0d44f.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/1/0430/1661/8145/files/83878268993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9810/7045/files/the_kawai_complex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7087/4009/files/mowakefesatenolalitopago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/rorufufogigolajege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3027/3435/files/jekejuwesebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5595/5624/files/tuget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/43406795801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/bazuzerakut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/fuwawodebijilasali.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 2

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_off00008661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8661 5880 bytes
SHA-256: aeaa5eacac598ce1aa8a96f68715a9f1a657a1a18cb58a18f263f5cb05707835
font_01_sfnt_off00009a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4D 10096 bytes
SHA-256: 6a64fcadfd7db3a7f843129fd8f1f7fe8b191bedc8078ea35ef2884f23f4da12

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