Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1385096addd8d66…

MALICIOUS

PDF

114.6 KB Created: 2020-08-04 17:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01e68b97a90f7e104fe0952289a4c80d SHA-1: b0323ddfaeb4274ea7646d2b6e0ec0afc078d6ea SHA-256: b1385096addd8d66379dc0645a064f3623a6ff8401ddd8ab07e7beb495708239
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a harmful site.

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=himnario+cantos+espirituales+iglesia+de+cristo+pdf
    • http://dekusoruk.proacademic.org/uploads/1/3/0/7/130738837/venugelogiz-jemevaj-bafesisale-sojilivifuni.pdf
    • http://files.1stcongucc.org/uploads/1/3/0/7/130739011/6a55eb112bf.pdf
    • http://files.rootsoflove.ca/uploads/1/3/1/4/131483281/a51bec804eb50.pdf
    • http://files.cleangreenaction.org/uploads/1/3/1/1/131164157/gotodanigogetomiwuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/vitogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/13037129107.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/molijetavoxemekox.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/bradley_hand_itc.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/53808155861.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/47715015681.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/nobositedumutefotupobe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/dutaponosuvoxukot.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/design_of_air_conditioning_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/christopher_hart.pdf
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/zubatatas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0768/0405/files/37687627126.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_off00017db1.bin
534e8931ee483ff608f5052e1f0b106b5b020d411cac79a7c74d89345d62076e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17DB1 5436 bytes
font_01_sfnt_off00019010.bin
5fcd1c48f7f549324c18ab82950f10cd67f2a03e9555e8fe73f065aec6c3b02c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19010 13500 bytes

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