Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2808e82dc918b8…

MALICIOUS

PDF

41.6 KB Created: 2020-08-25 15:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52490abf4bc6165fb41f5bca216b91ed SHA-1: 062ce2ceca41c09e7a8f956328caaa8edb2075ac SHA-256: aa2808e82dc918b85083b69bbeae658471cdc194f1ddfb719787e17ad7250571
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=google+plus+bot'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and the phrase 'Google plus bot', suggesting a lure to a malicious site. The file's purpose appears to be redirecting users to potentially harmful content.

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=google+plus+bot
    • http://files.dreamcatcheralpacas.com/uploads/1/3/2/3/132303205/kixukad.pdf
    • http://pevupa.wsfishfarm.com/uploads/1/3/1/4/131436967/vumukikojumifa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2236/7390/files/vobilitixim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4179/files/mabanugixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/82589751264.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/rogukasokoxerilivuwejuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4080/files/javoxebebiwetudeku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2569/3845/files/8876640411.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/wijadisigukegevini.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_off00006595.bin
69c44467ee974084117876f73d855b8684994f29173f0cfa06f33bd84dbad4e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 4852 bytes
font_01_sfnt_off00007636.bin
cfd5c677b6e655af9f94bf1b73eebe8f5c03cacae9ef29566b3e128db9324a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7636 10512 bytes

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