Malicious PDF — malware analysis report

Static analysis result for SHA-256 285d2271c1287fb9…

MALICIOUS

PDF

67.6 KB Created: 2020-08-20 14:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d79da6814cef87cf02a2d7c1200d57e SHA-1: 5e74c8db850bcae43fcf8c95ba18828bcee91cc8 SHA-256: 285d2271c1287fb96dae75aff27d18cdb5fed4231aecae89af982898e98ca8a2
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=como+aprender+ingles+desde+cero+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to Shopify domains, likely for SEO manipulation to increase visibility. The document body, though heavily obfuscated, contains the malicious URL and other benign-looking PDF titles, suggesting a lure to download a PDF.

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=como+aprender+ingles+desde+cero+pdf
    • http://files.inconspicuoushipster.com/uploads/1/3/2/7/132712011/5473984.pdf
    • http://jiretax.valkrystore.org/uploads/1/3/1/6/131636719/kufinibafat.pdf
    • http://files.maenadproductions.com/uploads/1/3/0/7/130775668/bizuvomawe.pdf
    • http://files.transitionstechcollege.com/uploads/1/3/0/9/130969966/godiborufumudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/xijadasivubapivizom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/interactive_electronic_music_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/56857419137.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/wijod.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/28872172048.pdf
    • https://cdn.shopify.com/s/files/1/0430/9922/6279/files/nadosepuzepikejinolujibir.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/jofapegijomedufegotexiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/34269858885.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/depebavunovegufuwikijakux.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0690/files/87135039038.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/450571226.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_off0000be92.bin
01012d7eb2eeda8eba82aa777c23328a5d7a11ef5221890ecda84a3e33e47b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE92 5380 bytes
font_01_sfnt_off0000d0c2.bin
a5d029ebc5b4fa9b4be07a2df136c685c431ab3d4aaf8c10bbc29ff14a3c9df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 15656 bytes

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