Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dabb2c306c41e7c…

MALICIOUS

PDF

35.5 KB Created: 2020-08-03 03:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 637abae82a7aa4f5d0b5f8f5e3c5d598 SHA-1: e265d525c60e94562387ca6c422f3d0df6595683 SHA-256: 7dabb2c306c41e7c6a92e89fe7bf9d2fc6ffef887c4322c1a3ce15891e4a7897
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=modern+physics+serway+solutions+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the document's purpose is to redirect users to malicious infrastructure under the guise of providing academic solutions.

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=modern+physics+serway+solutions+pdf
    • http://files.misguidedinthemagnolia.com/uploads/1/3/1/4/131408899/7bf981d.pdf
    • http://files.imarsonline.com/uploads/1/3/1/3/131380413/6c76ebc2.pdf
    • http://files.awesomealgebra.org/uploads/1/3/1/4/131455475/zokabu.pdf
    • http://files.heartandsoulministry.com/uploads/1/3/0/8/130815381/gekatomenako.pdf
    • http://files.jarryjornopublishing.com/uploads/1/3/0/7/130776601/ludekubefaxumoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/89854084106.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/53738550851.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/wopinijelagibaletilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/susidewapis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/filosobinijolekebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8857/5638/files/55209510198.pdf
    • https://cdn.shopify.com/s/files/1/0437/5101/4551/files/lunazepiguruxuxunufoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9512/files/tadorezezaluf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/53622724999.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/mn_uniform_conveyancing_blanks.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/pasezixike.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_off00004d35.bin
53aeebaabab122b653d3bb048324189b768fc0fccc1ac161e07b79838240ee39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D35 5440 bytes
font_01_sfnt_off00005fd8.bin
d3debcf00deccfbad4e9010923925e4f24b4ef6ea087f929ad168573cb67240d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 9724 bytes

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