Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56b1ea6040b0350…

MALICIOUS

PDF

47.3 KB Created: 2020-08-05 07:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e6a36a3cd3b1bab5fde831bb74851b5 SHA-1: cd740053ea4ce9bcc53091f9f8a910c538fe9bff SHA-256: d56b1ea6040b0350511943660101668d99000bc2879123434f1a77c78d6d4fac
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'adobe acrobat reader dc reduce pdf size' and a URL that appears to be a lure. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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=adobe+acrobat+reader+dc+reduce+pdf+size
    • http://karuso.wessexmaternityacademy.org/uploads/1/3/0/8/130874232/sebuxabibusura_koxiduraragapix_memaxetodukofi_kuripiji.pdf
    • http://zitikupo.sheltonprivatevoicestudio.com/uploads/1/3/1/3/131379730/zedule.pdf
    • http://files.justinmantooth.com/uploads/1/3/0/8/130814462/22b8a5.pdf
    • http://files.krmenterprise.com/uploads/1/3/1/4/131482886/5014760.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/pufex.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/51146418904.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/nixoradezovuvejusojibubaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/30752741448.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/55497601639.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/22912665195.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/55701137442.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/rokamegevidumosix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/37599128888.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/53548328726.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/3440260130.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/37098000030.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/pujifusatixakewegigobib.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_off00007bb3.bin
2a227e7e246ae2288062e806c05bd47df5996f6d642221790d1247ebfe3c4ea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB3 5296 bytes
font_01_sfnt_off00008dcc.bin
4038c075b7598f25cbde02ec073bb0afb4f25780a2141040ea263e2979625dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCC 9888 bytes

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