Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac30debbde41670…

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 01:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0dff03920d468024465bf91ee70196de SHA-1: 61ad69b5e5fb9acc1e0204cd88244169a8ba1649 SHA-256: 4ac30debbde41670384673564316f83c35cf115b2260feb57b233d2964bd199f
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains references to academic topics and URLs, suggesting a lure to external malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent, likely for phishing or malware delivery.

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=de+broglie+wavelength+problems+pdf In PDF document text
    • http://files.lisaannschraffasantin.com/uploads/1/3/2/7/132710763/rasujivozug.pdfIn PDF document text
    • http://files.ukerepublic.com/uploads/1/3/0/7/130776504/86c26f600d135b.pdfIn PDF document text
    • http://files.sukhi.no/uploads/1/3/2/7/132712115/9866922.pdfIn PDF document text
    • http://files.jetixrestored.com/uploads/1/3/0/7/130775747/83416.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/1/0431/3654/9018/files/36615865427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/22158810425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/48058578793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/derby_owners_club.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/990922074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/74905387566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/tusamaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/bebelezewetuwixategaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/72549256954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/51888847193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/convert_m4a_to_wav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0450/9853/files/80715128979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/51437297761.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_off000069e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E3 5744 bytes
SHA-256: f4f93927835fc16f3f0e6d665f5262653f3af59af65dd370999c66ab2de68098
font_01_sfnt_off00007d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5A 14476 bytes
SHA-256: ec35728eedca9d17658b1f81bf9f009a966265c2cf51a5f59189b097dfcb32b4

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