Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c773b3011a4daf3…

MALICIOUS

PDF

42.4 KB Created: 2020-08-13 22:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 683c1600e11dc29e20c4d5ae6d0ca870 SHA-1: 71b3b75116987e903bcb706ada807cd6159a15a4 SHA-256: 7c773b3011a4daf361854b8fb94d1bfb07716d44148b9fcb02853b0314a38eed
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with many links pointing to Shopify domains, likely to obscure the malicious redirector. The primary malicious link, 'https://ttraff.ru/pify?keyword=apptoko+ios+11', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Apptoko ios 11' and the URLs, suggesting a lure to download or access malicious content related to the app.

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=apptoko+ios+11
    • http://files.firstbaptistwheatfield.com/uploads/1/3/1/6/131606065/lufukubilixi.pdf
    • http://rimawujo.in2yogalapeer.com/uploads/1/3/1/3/131380005/bdde5.pdf
    • http://files.communitybetterment.org/uploads/1/3/1/4/131438629/6050175.pdf
    • http://files.aidasalazar.com/uploads/1/3/0/7/130739651/9411306.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/badolas.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/nafebogewos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/60438516914.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/zakinod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8927/2725/files/encyclopedie_francaise.pdf
    • https://cdn.shopify.com/s/files/1/0437/4478/8634/files/52250439843.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/7093488428.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7247/files/american_red_cross_bls_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/bodyboss_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/39677204310.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/46938731195.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/fonatonexax.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_off00006654.bin
d06691b12e988f98ab8780e4822d5835d6800f52e8585497ecd78ec1b50a97aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 4580 bytes
font_01_sfnt_off00007605.bin
b398ee4363012211044f6f90144ab5c040c5bb22278c6aa9652e372039194ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 10876 bytes

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