Malicious PDF — malware analysis report

Static analysis result for SHA-256 512d0cf0c53c57b2…

MALICIOUS

PDF

41.2 KB Created: 2020-09-19 13:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f722c13b6ebb0b2744aad3910362cd5a SHA-1: f1f1db58f484fb1b7caf269b7e889d675140c8b2 SHA-256: 512d0cf0c53c57b21fc3ed2194d16b241caaa8eb137fbe06f23e7d10aaa6dfe6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to create link farms for SEO manipulation or to hide malicious destinations. One critical heuristic identified a link to a known malicious redirector, 'ttraff.club', which is used in conjunction with a lure related to 'middle school developmental milestones'. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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.club/wix?keyword=middle+school+developmental+milestones In PDF document text
    • http://wukasas.michaelangelograyson.com/uploads/1/3/0/7/130776487/be680be09e212f.pdfIn PDF document text
    • http://files.soleorganizer.com/uploads/1/3/1/0/131070581/rizuribadi-vedurejakefoke.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/1/0431/8868/2915/files/runozemaguponasuxola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/35350444276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5973/5456/files/mobogenie_helper_apk_free_download.pdfIn PDF document text
    • https://2224c06c-0c1b-48df-b844-85e7cebcd784.filesusr.com/ugd/31593d_cb3a3a928d194fa78431d73851bb26b3.pdf?index=trueIn PDF document text
    • https://e82b7ff2-ebee-455b-8bd6-27f9f62a40eb.filesusr.com/ugd/fa6f14_05de45b21dd045c4b9b302da05b5db28.pdf?index=trueIn PDF document text
    • https://bac1274d-fa31-41a4-bd52-594dbeb74bac.filesusr.com/ugd/f14cf6_5fe8339b5761438bb4c8122640b1fbd5.pdf?index=trueIn PDF document text
    • https://16835c64-8807-4db1-a871-9e038ebd45a9.filesusr.com/ugd/e2c223_dc81b44115294e87938b480960d667bb.pdf?index=trueIn 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_off000062a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A7 5280 bytes
SHA-256: 6c545a9c89a87e19521775df6ddaac9e3a256dd75768403274a3fb5bfc910d44
font_01_sfnt_off0000748f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748F 10484 bytes
SHA-256: 83c16724916c7b95dc2ee807e93be81e4afaf70a9412032dbcff3a99fb40b835

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