Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d25d27524ab003e…

MALICIOUS

PDF

39.9 KB Created: 2020-08-17 14:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c0d261bf9735c00e9894eb98227a96f SHA-1: f94a0dbf9542a5279d5eead6ff001d62309a1b06 SHA-256: 3d25d27524ab003ea2a9e0154fc5abd013172d1f578d0f1834684bc9ff3e3b38
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Synonyms and antonyms meaning pdf' and the malicious URL. This suggests a social engineering tactic to trick users into visiting the redirector, likely leading to further malicious content or exploits. No scripts were extracted, and the primary malicious activity observed is the redirection via embedded links.

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=synonyms+and+antonyms+meaning+pdf
    • http://files.torreslandscapingirrigation.com/uploads/1/3/0/8/130814043/2e8b7d59.pdf
    • http://files.sitchinstudies.com/uploads/1/3/0/9/130969061/1f3038.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/82577870510.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/21884084963.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4359/files/48212133431.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/38956854659.pdf
    • https://cdn.shopify.com/s/files/1/0431/8681/5139/files/sosokax.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/16569699496.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/13734449165.pdf
    • https://cdn.shopify.com/s/files/1/0440/6601/3349/files/math_quiz_bee_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/zapomerobonetoniroj.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_off00005fde.bin
898493a5ec84bd7b6b24e37a013b55da071148a409f69173359d445b9cf1a488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDE 5440 bytes
font_01_sfnt_off00007252.bin
a127ebd189a04c5faaa1dac1d64541664f0663cd4bcd4de009717c45c607d2c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7252 9752 bytes

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