Malicious PDF — malware analysis report

Static analysis result for SHA-256 304d5cbef56908e2…

MALICIOUS

PDF

49.7 KB Created: 2020-08-08 10:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7b330829baef96f80322611bd2c1ca3 SHA-1: 528b4184839d38a6ab0aa75f6bd4af2aebcad841 SHA-256: 304d5cbef56908e2e51ea724d42348d5ce0fc653f3bf68c9a6bc0f0a62d5faa2
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The embedded URL points to 'ttraff.cc', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the target URL and keywords suggesting a lure related to academic content.

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.cc/wb?keyword=allophones%20and%20phonemes%20pdf In PDF document text
    • http://files.cbuproductions.com/uploads/1/3/1/3/131381428/vowixab-nadoli-xuxerimagesiro-mokabowame.pdfIn PDF document text
    • http://files.dkg-gammachi.org/uploads/1/3/1/4/131438245/mirejunofiju-lilov-rovawovenu-kavinid.pdfIn PDF document text
    • http://files.showuplifestyle.com/uploads/1/3/1/4/131408024/f2daf.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/1/0429/6117/4687/files/fotoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4546/1909/files/docs_powerpoint_viewer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/fubonituzixonodepifikuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/50485157960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/quran_urdu_translation_word_by_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2303/files/affairscloud_current_affairs_weekly_february_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/matthew_henry_commentary.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 7

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_off0000812c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812C 5176 bytes
SHA-256: 4406e47f2c78d97e974d0e8ad3b67a1d6f01215bd163f9a9f4f9f831cd79232b
font_01_sfnt_off000092a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A4 11656 bytes
SHA-256: 91924354d034f660626da6f1cf337bcb1da037ae52a65143c7b1b4571680a754

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