Malicious PDF — malware analysis report

Static analysis result for SHA-256 549df3e1b1119920…

MALICIOUS

PDF

95.9 KB Created: 2020-09-03 03:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98a87b080482a47c463a419521102e0c SHA-1: 3bcfb85dd45fe56ebc8491b2e272e8cd0eb54bca SHA-256: 549df3e1b11199200e7b8743f787e8c2616b8de00fcea9eeabddef567899fa43
150 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.me/wix?keyword=love+yourself+answer+bts+album+cover'. This URL is presented within the document body under the guise of information about a BTS album, indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a broader campaign to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=love+yourself+answer+bts+album+cover
    • https://static.usrfiles.com/ugd/cc3ca9_1338aad9aa8246118176ff39928a56ea.pdf
    • https://static.usrfiles.com/ugd/3aca14_38758c03f0ad4019851e86da57570e9f.pdf
    • https://static.usrfiles.com/ugd/0c60a0_ef26e6c2dd834dab91bccdc06bfb5837.pdf
    • https://static.usrfiles.com/ugd/ac51ce_9ae88e26dd414842be8d92e44b7c5e9c.pdf
    • https://static.usrfiles.com/ugd/599f1c_c27eea6456fd408690bebcf76beecbb5.pdf
    • https://static.usrfiles.com/ugd/41f880_98bcbeb01f744717b8675fa43e42511b.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_04d79d4cf8f044acb9c1f346791be8d7.pdf
    • https://static.usrfiles.com/ugd/4d6844_4bfdf6ce37714076847df08e339338fe.pdf
    • https://static.usrfiles.com/ugd/4117a9_f7faa7a4b3794a14b3ff841327eadb94.pdf
    • https://static.usrfiles.com/ugd/3aca14_5be99c68e4174d1e8a86290e59b34516.pdf
    • https://static.usrfiles.com/ugd/805d2a_26d46adaf521407bbba647aace878ddf.pdf
    • https://static.usrfiles.com/ugd/b8c837_115051585d174e71acad2c1513252438.pdf
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/blender_3d_sculpting_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/genetics_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9436/files/rajasthani_bhajan_karna.pdf
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/luwapolerero.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_off0000d7c1.bin
fa305dd300a33dfbdad8e05d13975ecb3bf0bcc459da7f00932d361e16a2c036
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 26876 bytes
font_01_sfnt_off00012a5e.bin
30fa2f159bd056ee3e830d1b84ee0cae6223c53da6ed184aeb593f443364b448
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5E 5360 bytes
font_02_sfnt_off00013ca7.bin
380cd575367c1acc7ac4a7db4aff56c777a70bdb1c53975c1cb341e58b68bf2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA7 16880 bytes