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)
MD5: b7b330829baef96f80322611bd2c1ca3 SHA-1: 528b4184839d38a6ab0aa75f6bd4af2aebcad841 SHA-256: 304d5cbef56908e2e51ea724d42348d5ce0fc653f3bf68c9a6bc0f0a62d5faa2
150 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 3

  • 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.
  • 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
    • http://files.cbuproductions.com/uploads/1/3/1/3/131381428/vowixab-nadoli-xuxerimagesiro-mokabowame.pdf
    • http://files.dkg-gammachi.org/uploads/1/3/1/4/131438245/mirejunofiju-lilov-rovawovenu-kavinid.pdf
    • http://files.showuplifestyle.com/uploads/1/3/1/4/131408024/f2daf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/fotoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4546/1909/files/docs_powerpoint_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/fubonituzixonodepifikuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/50485157960.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/quran_urdu_translation_word_by_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2303/files/affairscloud_current_affairs_weekly_february_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/matthew_henry_commentary.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000812c.bin
4406e47f2c78d97e974d0e8ad3b67a1d6f01215bd163f9a9f4f9f831cd79232b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812C 5176 bytes
font_01_sfnt_off000092a4.bin
91924354d034f660626da6f1cf337bcb1da037ae52a65143c7b1b4571680a754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A4 11656 bytes

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