Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b0431e9f3cf25e…

MALICIOUS

PDF

39.0 KB Created: 2020-08-10 04:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd2e883d72a30944411e2293f033c07 SHA-1: 8c1388c335032b8a15f664dbedc1fef7adb13222 SHA-256: 46b0431e9f3cf25ef3a8d5df297aba6cd67fe618b9e4452b1db95509382e7c91
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=argumentation+understanding+and+shaping+arguments+5th+edition+pdf', is designed to redirect users to malicious content. The document also contains a large number of SEO-optimized links, many of which point to Shopify domains hosting PDF files, suggesting a link farm tactic to improve search engine ranking for malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=argumentation+understanding+and+shaping+arguments+5th+edition+pdf
    • http://files.hopeanimations.com/uploads/1/3/0/8/130814346/8090035.pdf
    • http://files.dahammaak2k.com/uploads/1/3/0/8/130814393/molabaju-mapusa-fexufegojuvome-katobesipu.pdf
    • http://files.northwestalbertabrighterfutures.com/uploads/1/3/0/9/130969077/4618884.pdf
    • http://files.the-freelance-artists.com/uploads/1/3/1/3/131380126/e25a62320b7.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/how_to_read_a_person_like_a_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/wakalez.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/catfish_farming_in_concrete_tanks.pdf
    • https://cdn.shopify.com/s/files/1/0434/3241/1298/files/bhagavad_gita_gujarati_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/saree_blouse_block_cutting_method.pdf
    • https://cdn.shopify.com/s/files/1/0438/2087/5938/files/export_nano_docker.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/66407879660.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/after_we_collided_book_download.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_off00005853.bin
675a7b132aaa1107ec1590a606ce15862fb96b099fbe34c1f0b143c826803629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5853 5536 bytes
font_01_sfnt_off00006b01.bin
7e8bc60ce12692706a7d1d73d9d438d66caf00fd0e29312872103396fb888d48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 10504 bytes

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