Malicious PDF — malware analysis report

Static analysis result for SHA-256 581955d70ce1a2b9…

MALICIOUS

PDF

69.2 KB Created: 2020-08-22 01:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a87614481d955bc7909150fb121e8a65 SHA-1: 4c8832c5a414e8acbc315fa411dd7b313d6c3b53 SHA-256: 581955d70ce1a2b91ac8aad2cabcc0168311f2983929719d884d7d611722da14
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 pointing to 'https://ttraff.com/pify?keyword=follow+guidelines+synonym'. This URL is likely used to lure users into a phishing or scam operation. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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/pify?keyword=follow+guidelines+synonym
    • http://files.compassionate-language.com/uploads/1/3/1/4/131406893/2f62994bafcffa7.pdf
    • http://files.ribbonsbiz.com/uploads/1/3/2/6/132695391/c9ad23d48c764.pdf
    • https://cdn.shopify.com/s/files/1/0445/5481/3599/files/agronomy_treatise_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/surah_baqarah_full_in_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/61744950129.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4966/files/10131082307.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/alvin_and_the_chipmunks_1983.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1712/files/xivujekupelonubeviwej.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/kunegejixixuvurit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6087/9782/files/89699375752.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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0000da50.bin
90fc200e3ab4fc285bfd95cbf476f74bfb7b0c604fa52f13d98103f0584c4f1b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDA50 18908 bytes
font_00_sfnt_off0000518b.bin
5cead508df49fb20cb3866e04d29932efced0caf642d730f269cb6721d61857e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x518B 6288 bytes
font_01_sfnt_off00006738.bin
8f019806beb4105b6a84de5a48237aa125d9a1023270a5b4154091b4db845ee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 4988 bytes
font_02_sfnt_off00007839.bin
3b2843af7010ae2f0b96634915db093b740299afd89a3f632862097ca169bcf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7839 3708 bytes
font_03_sfnt_off00008590.bin
864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8590 2328 bytes
font_04_sfnt_off00009046.bin
d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9046 2108 bytes
font_05_sfnt_off00009a11.bin
538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A11 6640 bytes
font_06_sfnt_off0000abaf.bin
490b58643a98db656fbbed480e6de142173fcce0b1556e9a8537ec9056739142		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABAF 15508 bytes
font_08_sfnt_off0000f8ed.bin
c12c670e310cd2dd0f4b1ea6ea0d01ef35e1284caa1cfc967b978b02bd897c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 3276 bytes

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