Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c43bbcb856d5c60…

MALICIOUS

PDF

35.7 KB Created: 2020-09-05 22:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6af5011bef3d3aa850d74a793e230f3a SHA-1: 804e57cbf5ce7488414f83df33aa031ce273cdbf SHA-256: 8c43bbcb856d5c606f9a16cda88443fdc165ef5586f7ef808c13a0d844671887
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie download. This suggests the PDF is designed to trick users into clicking malicious links, likely leading to further compromise. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the malicious nature of the redirector.

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.link/pify?keyword=vimanam+full+movie+free
    • https://static.usrfiles.com/ugd/bd7df1_4967f659a6db49cd8209291d66b662dd.pdf
    • https://static.usrfiles.com/ugd/f6a907_8be8b2c67e9e437586e7e12dfdc3ad42.pdf
    • https://static.usrfiles.com/ugd/a474dd_d76276c4b329436db0f808e0c4e16e3f.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/buwim.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3975/files/vigumet.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/35727816955.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/arrest_charge_sheet_case.pdf
    • https://static.usrfiles.com/ugd/225520_6e2524c617244b369bc1ea73629e9eac.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_b2a994c7b3704414beec7258c2f20164.pdf
    • https://static.usrfiles.com/ugd/5ad03d_2df4746227384f51b87004401eb31d4b.pdf
    • https://cdn.shopify.com/s/files/1/0437/8673/1681/files/15816724982.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/harley_davidson_parts_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/49001153860.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/relic_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/address_in_english_format_example.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_off00004ea8.bin
c6fb280299b25a3d8214c66dfe882fe2f4082038eca7fe83f4bcbef5f8a5721c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA8 4760 bytes
font_01_sfnt_off00005eca.bin
404655ba9cdc44caeaa1384035e92231b2a1be43c86d1f7301443e21158567be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 10400 bytes

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