Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c30aa7541ea1196…

MALICIOUS

PDF

54.8 KB Created: 2020-08-14 19:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0041e8c21bbda15b9c6496006b8275d2 SHA-1: 63e79d3eeb8fa86cfbdf7bd1bfb50f06d27024d3 SHA-256: 7c30aa7541ea119627c4177ff1ffb8e5db40df45b61455c944fc9b74b7ab4310
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, however, redirects to a known malicious domain (ttraff.ru). This suggests a link farm or redirector strategy designed to lure users to malicious content. 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=arkestra+program+2018
    • http://files.greenchairpictures.com/uploads/1/3/1/4/131453897/modagovum.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/4810757309.pdf
    • https://cdn.shopify.com/s/files/1/0429/0936/8476/files/minecraft_ssundee_lucky_blocks.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/tegunejabemewovudet.pdf
    • https://cdn.shopify.com/s/files/1/0452/2527/9648/files/pdf_ausfllen_und_speichern_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/23729937899.pdf
    • https://cdn.shopify.com/s/files/1/0428/4212/8550/files/census_2020_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7471/files/66732189496.pdf
    • https://cdn.shopify.com/s/files/1/0437/2470/1847/files/subordinating_conjunctions_worksheet_year_2.pdf
    • https://cdn.shopify.com/s/files/1/0439/0646/5947/files/pdf_to_word_mac_free_online.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005906.bin
7a7db42f553b9860b8e5b91daf2ec9d931bf976b0eafc48489be82f1d7d27cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5906 5680 bytes
font_01_sfnt_off00006c46.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C46 2116 bytes
font_02_sfnt_off00007612.bin
9752e62e08bd20e82d169b91a14f9dc8800d79bfe0c398f542b3734601615b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7612 10016 bytes
font_03_sfnt_off00009895.bin
45743d3500c034dba9adc74f83b3fc9b2ea9cdceeeb052ae47db933c54c3c365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9895 17116 bytes
font_04_sfnt_off0000b18b.bin
0cd211fbf3e0418eaf91f996e0bc014bad7a1f86868a919f460f179f733f16e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB18B 8832 bytes

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