Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9cc74c756f33586…

MALICIOUS

PDF

38.6 KB Created: 2020-08-28 01:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25983cb3574038f0228cfa1a7fca965 SHA-1: 735fb7eb706e26c63d5c6c7219b7e27b1873da09 SHA-256: c9cc74c756f335863bbc2978f6d964fe41953c9709db39d588c8f8c2e29d9bee
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=assistir+filmes+8+segundos+dublado+o'. The document body, though heavily obfuscated, contains text related to movie streaming, reinforcing the lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. 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.cc/pify?keyword=assistir+filmes+8+segundos+dublado+o
    • http://files.odroslore.com/uploads/1/3/1/3/131398497/88baf480f5.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/92422199599.pdf
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/sefupazatufobememaxomafat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/fejemuzinug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/arens_auditing_and_assurance_services.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/wordly_wise_3000_book_8_lesson_4.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/39239992868.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/13525293015.pdf
    • https://cdn.shopify.com/s/files/1/0432/5854/4292/files/crazy_monkey_studios.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/refalosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/sdgs_2020_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/66389983624.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/ranaresiriden.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004593.bin
800f281923fddcf73e1a22905d3b4a8172d12e09d19230123a203f975ef0857a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4593 5432 bytes
font_01_sfnt_off000057df.bin
69fd66f2b54c3a0e708802ceee9621ccad9550923a672c24455c2104fe5ee414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 12500 bytes
font_02_sfnt_off00007def.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEF 4324 bytes

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