Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10eb070f1643eeb…

MALICIOUS

PDF

50.7 KB Created: 2020-09-05 21:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8247d739df730245f62cf5c0b3ba4fc9 SHA-1: 58ae20a4d4ce46d6efc77fe32f2ccc7a7dfb1938 SHA-256: c10eb070f1643eeb90fcb146dbb11b95b156a62440fb1dcc7410c7625c4c7f5d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL and a seemingly unrelated title, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, many pointing to benign Shopify URLs, likely to mask the malicious redirector. The primary malicious IOC is the redirector URL.

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.link/pify?keyword=abhishekam+audio+songs
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/biochemical_engineering_and_biotechnology_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/10745184278.pdf
    • https://cdn.shopify.com/s/files/1/0462/6776/0789/files/36389533219.pdf
    • https://static.usrfiles.com/ugd/b47706_5560bbbe498140a799cabf384182ef2e.pdf
    • https://cdn.shopify.com/s/files/1/0464/3110/9272/files/xozepulumibovejinepeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/38280695619.pdf
    • https://cdn.shopify.com/s/files/1/0428/5726/7359/files/68179251289.pdf
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/sparkle_1976_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/6660/6247/files/wuxizugubaxowazukaxezaju.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/ginafakisef.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_off00008583.bin
be6678bdf338db631c154ed6b03276adc5cb58772c776162d41dc6323deac8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8583 5304 bytes
font_01_sfnt_off00009769.bin
2399ff8be9abc2c0711f8a218932ffdc2073a4ad6b59ba4deb2e7ee1a14a462d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9769 12276 bytes

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