Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c613febb0ec780e…

MALICIOUS

PDF

53.1 KB Created: 2020-08-07 16:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c98a405306b995cfc43f158bf0fff0e SHA-1: d8be54d8cc67185216feed825129acf2fa139ac5 SHA-256: 3c613febb0ec780e353ae6d0aacd7d49a265ba621957cfcb272296f385905ce8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=all+branches+of+engineering+pdf. The document body, though heavily obfuscated, contains text related to engineering and the URL itself, suggesting a lure to trick users into clicking malicious links. The presence of numerous Shopify URLs, some confirmed benign and others unknown, indicates a link farm strategy.

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=all+branches+of+engineering+pdf In PDF document text
    • http://tisoma.webuyhomeslauderdale.com/uploads/1/3/1/4/131406390/risororusojapilumitu.pdfIn PDF document text
    • http://files.southtahoefootball.com/uploads/1/3/1/4/131437085/148c3c3.pdfIn PDF document text
    • http://files.richardwilliamsvideos.com/uploads/1/3/0/8/130873822/5090814.pdfIn PDF document text
    • http://xudok.garcinmcnabcollies.com/uploads/1/3/1/4/131482975/1072000.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/1/0429/7054/6329/files/pivexonujimotadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/89405775617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/outlook_signature_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/nelson_mathematics_grade_7_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/kejeresemebexuwirovajaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/20556280617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/48475937340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9006/files/vixefelazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/43438172610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/rebeturisiruzor.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 6

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_off00008bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBD 5544 bytes
SHA-256: d50e931225cd71998d9f244c0d80fcb68cde1e962861b0e964573807e1abfdac
font_01_sfnt_off00009e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8C 12940 bytes
SHA-256: fe26302e58446021fe9588d5e30f8390f01b9c77796b9fe950d25526f4f797c0

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