Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d46102785c1da9…

MALICIOUS

PDF

50.2 KB Created: 2020-08-21 18:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9afe0b17347abfd07b84f8646e5d7592 SHA-1: 2d59402d6dc262842357273ba0f27dcf4a0467dc SHA-256: 37d46102785c1da94485edab974f847519a5f45edc3989ccec19db054ce5cdf7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious intent and the technique of using link farms.

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=tv+guide+bbc+alba
    • http://teleki.bedfordbiblechurch.com/uploads/1/3/1/8/131857252/ea8b0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/72872825836.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/13225560933.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/saccular_vs_fusiform_cerebral_aneurysm.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/loboganajabawuwo.pdf
    • http://jirijut.urban-south-brewery.square.site/uploads/1/3/2/3/132303035/rorilavotomixumarup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/71068421541.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/mipetopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/robosojok.pdf
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/xurasafamegogu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/44186006719.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/guxigefibap.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/xekulekuviguto.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/gexumojabajewufubenafekox.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_off00008623.bin
96d96275561b4c8cb4375479e1ccf73848bcca49a97ef23ae7edf4ecd3c87555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8623 4980 bytes
font_01_sfnt_off00009728.bin
344046ccf92cf6e6e347001ef25c45a8818a6e6a6ff1fe4b506daf77052f9c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 10816 bytes

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