Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6d9177aac7ec94…

MALICIOUS

PDF

40.2 KB Created: 2020-08-24 00:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c41bf3ab5cb2fbc6976f01818937697 SHA-1: 00bfc0c912571f37e962ed8dcff77e421057e63e SHA-256: aa6d9177aac7ec946b2dca648a85a4f1d216d2c851c5e1dd3c23c62c05d7afe7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a mass of external links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=java++windows+10+chrome, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains keywords that appear to be SEO spam, aiming to attract users searching for software or operating system information, further supporting the lure tactic.

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=java++windows+10+chrome
    • http://laxapu.ldupholsterymaui.com/uploads/1/3/0/7/130739561/3f9f9.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/the_bible_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/ditukinukufarasaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/44181148515.pdf
    • https://cdn.shopify.com/s/files/1/0432/6483/5737/files/grass_brush_photoshop_cc_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/gutujifosuliremojapabug.pdf
    • https://cdn.shopify.com/s/files/1/0438/3218/0893/files/44165904555.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/63052282607.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/33054666654.pdf
    • https://cdn.shopify.com/s/files/1/0446/9443/8042/files/ziwevoxajak.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_off00006010.bin
3dd93be3286108ba6c17208a0154ffc404ed86ce2bcb44cf8c3fa5a5aea7728c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6010 5480 bytes
font_01_sfnt_off00007298.bin
43c13213849b7dfdf71ce427a7ad6562785272b23a65100ed6dbf65e0ffea7bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 9940 bytes

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