Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc62136c7f69ca0c…

MALICIOUS

PDF

39.6 KB Created: 2020-08-18 21:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e839190d7d1de185804baf1f1bb5c83 SHA-1: bb782dcaf5c8a1941362118dc48c2fedd0e3f534 SHA-256: dc62136c7f69ca0cbd7e79f8109daa2630b1174886038819c212b1520ee4fbf8
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=shoot+apical+meristem+development+pdf. The document body is heavily obfuscated, but the presence of numerous links suggests an attempt to lure users to external, potentially malicious, sites.

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=shoot+apical+meristem+development+pdf
    • http://files.dbhomeatlast.com/uploads/1/3/1/1/131164295/rizebudipilob_kuletivozaxe.pdf
    • http://files.faithacademyfootball.com/uploads/1/3/2/7/132740253/aef11745b42cea.pdf
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/vanibabotisolip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/12370413614.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/11843408117.pdf
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/82783530043.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/73944241510.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/gejorewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/fivuxujexetojuruxuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/moralipezoripej.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/62538862772.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_off00005e52.bin
06c613b2edab96f64403dddcadd317d5fcd277b4780aaf8f5dc87646490bfaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 5556 bytes
font_01_sfnt_off00007117.bin
0b50bd5df746f2e4a22fa7f2b58a7e04d9d5a51f509731b9b1fb54034d5713ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7117 9608 bytes

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