Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ef6a4268aab114…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 18:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab06921296249ccb94c1be581d689ebf SHA-1: 47fd5637e0cbd1a4611b483f281479272d352e57 SHA-256: f5ef6a4268aab1149d9b8ea498ece5e1a86da91db321d7f49aa4e4f619a48155
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.ru/pify?keyword=commercial+photography+contract+template+uk. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a link farm designed to obscure the ultimate malicious destination. 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.ru/pify?keyword=commercial+photography+contract+template+uk
    • http://files.sarasotacommunitychurch.org/uploads/1/3/0/9/130969053/9c78f1d.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/83045816823.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/knowing_god_ji_packer_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/21016186703.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/42459464460.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/annus_mirabilis.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/13680342900.pdf
    • https://cdn.shopify.com/s/files/1/0437/9253/1617/files/the_lion_in_your_living_room.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/28464717254.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/zegavokajizu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/karatsuba_multiplication_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/2581/5959/files/89648440807.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/94667245834.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_off000061b5.bin
df7d5f5f4decbb4148f5ecfe7c74db57af138533f91647a7666155c19db181a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5240 bytes
font_01_sfnt_off00007361.bin
b9c42878ef49d5f34999900e7ff672db7d6b5f8d414690859f4f534b0a6da7b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7361 9912 bytes
font_02_sfnt_off0000955b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955B 4324 bytes

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