Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19c61af8d33fb07…

MALICIOUS

PDF

41.8 KB Created: 2020-08-21 23:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c299c4684168b30c37acaaae5513953 SHA-1: 16b806baea65d334784cfa6c735e880cc5c1d6fd SHA-256: c19c61af8d33fb07eb16540be2064fdd4d7f69fe6c16a080f30508a91f197ea1
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as academic content. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly indicates 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.com/pify?keyword=accounting+and+finance+dissertation+pdf
    • http://foxisarux.maggiemcmuffin.com/uploads/1/3/1/4/131408899/f0ea055b6cad5d.pdf
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/is_there_a_zip_code_00000.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/84766140696.pdf
    • https://cdn.shopify.com/s/files/1/0441/3367/9256/files/pusoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/bodogisobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/pibobemegelesuvodima.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/tapibajoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/21245686284.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/how_to_bold_text_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/5300587088.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_off00006509.bin
7abd0796eed581dc69bd09ab90c44351a7ddef8ef6ad0742ee86a04c696c2f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6509 5280 bytes
font_01_sfnt_off0000770b.bin
3a9fcbae26e306afbf27189187da72fcef6d3139390736a6b2d4ff4aafd699af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 10304 bytes

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