Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3504e9be8f6d3e…

MALICIOUS

PDF

63.7 KB Created: 2020-08-15 00:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b11f0e856f3a7c4dbc5272af951d5c1a SHA-1: 6f256a0b3b27360c23025981351aa9855d2dcd49 SHA-256: bb3504e9be8f6d3e26542e91eccdd4e743bcb641d44557bd8cf625789d309d5b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=cards+against+humanity+expansion+pdf+german
    • http://xamitita.yosefrefaeli.com/uploads/1/3/1/4/131406717/15865500aab32be.pdf
    • http://files.lonestarbee.com/uploads/1/3/1/4/131453984/wuduzinemoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/34150468959.pdf
    • https://cdn.shopify.com/s/files/1/0439/7511/4910/files/analects_of_confucius_summary.pdf
    • https://cdn.shopify.com/s/files/1/0437/9944/5661/files/13210237583.pdf
    • https://cdn.shopify.com/s/files/1/0438/8972/1496/files/the_game_pickup_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/4845/8647/files/awk_command_in_unix.pdf
    • https://cdn.shopify.com/s/files/1/0439/8556/7902/files/56855829252.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/20901749784.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/jakefosefepexewozumokuke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a48a.bin
11b4acd776612e12a5b00de13772708e8296d7d9eb510a4279d028d50ccdb20b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA48A 5500 bytes
font_01_sfnt_off0000b71f.bin
5cc0e02be40e4199ed532b9eb1a0442412a08f71d74f99f2992982bb12d9d78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB71F 11108 bytes
font_02_sfnt_off0000dd28.bin
9f5c39b122af328b89576799afa35494b2b074404cd229a8255c6cd1781c5d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 16072 bytes

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