Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c03392e43f55519…

MALICIOUS

PDF

71.6 KB Created: 2020-08-12 10:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba894c7781d110ed828fccfec8b877fb SHA-1: 8070ac98572aed6856d23f90a1b1dbf1615e2472 SHA-256: 4c03392e43f55519ae86258970a1678f30a920c7911b6e892b7df9a55d516142
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. This URL is presented within the document body, disguised as a link to download financial publications. The presence of numerous external links, many pointing to Shopify domains hosting PDF files, suggests a link farm or SEO poisoning tactic to attract victims. The ML classifier also strongly indicated maliciousness.

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=money+banking+and+finance+by+bsc+publication+pdf+free+download
    • http://files.scottishpinesrehab.com/uploads/1/3/0/9/130969434/mowusedipiw-sunojaxozuno-satotogivizil-zirudositelari.pdf
    • http://dodoro.bethmccomish.com/uploads/1/3/0/8/130874254/35ed532bc.pdf
    • http://files.nfbfishing.com/uploads/1/3/1/3/131398547/gexivanegote.pdf
    • https://cdn.shopify.com/s/files/1/0450/7333/4424/files/vline_train_timetable_ballarat.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/diabetes_definicion_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/ctet_answer_key_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/wezuzerupigipasitefowupe.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/niwezuzibogogabasutiraf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/ejercicios_clases_de_sustantivos_1_eso.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1879/files/b_pharm_1st_year_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/janokokofidativinatub.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/niteritinufeloxiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/nusibolim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/dazabok.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/supopiw.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007497.bin
aab4037a030f926406d56985cb431cd69567ba25239caa1314d25a18bc51c148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 18796 bytes
font_01_sfnt_off0000b07d.bin
7328e3bc15d1439dff13d71b0acef5b8b657dff812a841985d8c8e1c1a95bbf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB07D 5724 bytes
font_02_sfnt_off0000c42b.bin
5c73db1bde43bfc792ffe60927169b2d16fdbd2fbdcd402fc7d1d648c3364a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC42B 4976 bytes
font_03_sfnt_off0000d423.bin
03e55e66868f54e72d58bc60aa7087e7ac02af55810e3a13370b2379b2bfbb54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD423 10552 bytes
font_04_sfnt_off0000f855.bin
0fba2a14480bfcd2b0d095f0a8aba8f7e90c2c5708cf3778f2f71eb121e2d34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF855 16692 bytes

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