Malicious PDF — malware analysis report

Static analysis result for SHA-256 441a246cf4167385…

MALICIOUS

PDF

41.5 KB Created: 2020-08-23 12:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 508fa5ef13f54e2b82b93d4f4c81f9b4 SHA-1: a88d0e453094960cc8738a05e75af4ba96252dcb SHA-256: 441a246cf41673851e72d15f72e7bff0090a717b2e2a0a388a3ff7702b6ac92a
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=sony+a5100+video+file+format', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to the 'Sony a5100 video file format' lure, intended to entice users to click the malicious link. The presence of numerous other PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=sony+a5100+video+file+format
    • http://pawor.jaxburgoyne.com/uploads/1/3/1/8/131856543/nekekofi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2491/5359/files/brochure_mercedes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5317/files/18285018196.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/kapaxoribev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/29731105079.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/4342654662.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/26769466417.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/26518055517.pdf
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/advanced_semiconductor_fundamentals_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4004/7253/files/bokezil.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_off00005602.bin
6eaace29fa79689251da171606c16793277cdb353656583afa8ddd1031a76005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5602 5244 bytes
font_01_sfnt_off000067c4.bin
a37f02055adff14ed10e6aadb19c7de2858a047996e40be57e54c429578168c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C4 10364 bytes
font_02_sfnt_off00008b3a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3A 4324 bytes

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