Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e99f964c1a5a1b…

MALICIOUS

PDF

43.2 KB Created: 2020-09-01 02:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae1168d7f10b9bddce93b6b9803eb450 SHA-1: 390e932b6b502f0f46c7c9bb278d4d6f05c25252 SHA-256: 53e99f964c1a5a1b6cf188efccf4ce40892f5f7141e4a0b6582324b7f322923d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=banderas+del+mundo+pdf'. This indicates a social engineering attempt to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains references to URLs, reinforcing the malicious link redirection. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=banderas+del+mundo+pdf
    • https://cdn.shopify.com/s/files/1/0440/7944/8216/files/duparim.pdf
    • https://cdn.shopify.com/s/files/1/0429/8109/7631/files/detective_girl_of_the_steam_city_apk.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/best_breathable_sheets_for_summer.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/merowuxaxuwuxititutok.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/cysa_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/neet_biology_chapter_wise_previous_year_questions_free_download.pdf
    • https://static.usrfiles.com/ugd/37321e_daf1cec7fbee421182e100ce0e93ab49.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_8dfc9d85deac47099d622c48a24d12b2.pdf
    • https://static.usrfiles.com/ugd/dd6616_920bcd89c7264f20b973ce03002f9e72.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eb25f9902e447c89147184e0b68948f.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/rosetta_stone_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1749/files/video_from_vimeo_password.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/barriers_of_communication_in_an_organization.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/insect_field_guide.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_off00006895.bin
9c619cfcd2d46ff4151c8dcab95f36acdbf3bd8d35144f3b88a2d5e567180ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6895 5236 bytes
font_01_sfnt_off00007a4d.bin
964b86038b2c75c6c23e1226f8d8f3d8d7a0fad845b285bd131536f49ef7592d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4D 11228 bytes

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