Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dd50abd4ce5eb2…

MALICIOUS

PDF

45.4 KB Created: 2020-07-31 07:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80d34c11b5e6202c7b195704a854fb5c SHA-1: 58cafacc11a318523d0b7b4a507f9135a0127ade SHA-256: 12dd50abd4ce5eb21d2c5db344ba233ecb9b54f404f08f1f8a9b964b9e8254a9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, designed to trick users into downloading further content. The primary malicious URL identified is ttraff.ru, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'advantages and disadvantages of centralization and decentralization pdf', likely a lure.

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=advantages+and+disadvantages+of+centralization+and+decentralization+pdf In PDF document text
    • http://files.tlppoetry.com/uploads/1/3/1/3/131381376/faruguzazenup-nakerifokadifuf.pdfIn PDF document text
    • http://files.hypopara-awarenessday.com/uploads/1/3/0/7/130739782/jenujevugebaxemit.pdfIn PDF document text
    • http://files.aarstudiomasters.com/uploads/1/3/1/4/131483019/c9e12.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/1/0429/8866/7034/files/bevumisufatuwadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/67171730149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0283/0745/files/52176654359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/fofis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/59175272355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/biruxatuwosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/58287310889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/58585561392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/baworosaxapeteve.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 5

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_off00007406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 5208 bytes
SHA-256: b0392589e5851c2688d4ba0229988976b02072333cc8e44c15a3c22f21de0f14
font_01_sfnt_off000085da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DA 10064 bytes
SHA-256: f3360fc775d14b36e71b2df6b22a26f9186a81dc720c3bde133c91145042b834

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