Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0395296cb23bc5…

MALICIOUS

PDF

48.0 KB Created: 2020-08-21 18:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdc872da85e04c5a4618a834b9b9003b SHA-1: f4e263436735844c17001c4c3a1802f74a6a7a09 SHA-256: ed0395296cb23bc5ac2f70a162e5d21f143248650427a0a755e290e9bb1de9ea
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic firing. It contains a link farm with numerous external PDF links, with 'https://ttraff.ru/pify?keyword=adding+values+in+different+sheets+excel' being a primary example of the malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though heavily corrupted, contains fragments of the same URL, reinforcing its malicious intent.

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.ru/pify?keyword=adding+values+in+different+sheets+excel
    • http://texaradir.anjaeden.com/uploads/1/3/1/3/131383483/84afe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/nabezemanuwofaxasug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3472/1959/files/63629500074.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/cygwin_ssh_server.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/chemistry_book_class_11_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/doki_doki_salvation.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9308/files/ready_player_one.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/50601910751.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/printable_softball_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/67043476806.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/mc_210_rv.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_off00007ca4.bin
3596be00bea7bc4f70a479805b4b648b2c961708a9b22d1b3e3cf9d6428f4c9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA4 5400 bytes
font_01_sfnt_off00008efe.bin
f8f052533f88086937e9679a30eee8fba0e88a865f9ab732c2e966aaa960d984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 10488 bytes

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