Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d48aa489924d09b…

MALICIOUS

PDF

35.1 KB Created: 2020-08-30 08:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682174e9d3f44146a33dd139ee7e8f6b SHA-1: e30a1de7e3df7a9085fd0af57e61b398e70dde97 SHA-256: 4d48aa489924d09b29f9e65a2a3c4a44748f85a367b730095904aa3e928a5f43
128 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a link farm hosted on static.usrfiles.com, and one critical link to ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Demon Slayer' and the malicious URL, suggesting a lure to attract users. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful destination.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=demon+slayer+kimetsu+no+yaiba+episode+4+reddit
    • https://static.usrfiles.com/ugd/4cf28d_bc87f7b1afcb4a92bc669d9e9ffb4fe7.pdf
    • https://static.usrfiles.com/ugd/b8c837_139045fa44014a24ac06e59f8c364058.pdf
    • https://static.usrfiles.com/ugd/19ce5d_d92e07412d2c4d4f851570293b9571d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d7f62b6f81141dda8cfe8bf027d8c86.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe114e92fed432bb41651a335f86c31.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/ctet_question_paper_7_july_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/2903155816.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/jebugiturupuvaxudofog.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/tigajenujabukabadow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/74349792109.pdf
    • https://static.usrfiles.com/ugd/93971e_b24bdf58dfa948f9893822dd06d45dcb.pdf
    • https://static.usrfiles.com/ugd/3cb679_72ed058633924383b81000c735bbd60e.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc382d467c754a869cd3d621bcb08ec2.pdf
    • https://static.usrfiles.com/ugd/822ecd_fde8a2bb2a8943fca90037aba6a92fed.pdf
    • https://static.usrfiles.com/ugd/98857b_bdb1e7059be54d729cd5b0068793799a.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_off00004871.bin
81f9f6ee0bec2f5480e15d163cae99af83b58260894bd048b6ebcb4bdbd8d361
pdf-font-stream PDF embedded font (sfnt) at offset 0x4871 5496 bytes
font_01_sfnt_off00005b15.bin
6d5de7944c271f42cfabd9f9230d62b3eb9759187880033c8f099e15d4ff3dc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B15 10048 bytes