Malicious PDF — malware analysis report

Static analysis result for SHA-256 d635e8c3dc5dd212…

MALICIOUS

PDF

37.1 KB Created: 2020-09-05 01:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0145de2767a712e343249ecb7af47c17 SHA-1: 941af6d2ceced19d9188f3d2551227f591b8093c SHA-256: d635e8c3dc5dd212402ae79d83a4819812c1f7c9898573b82be33c5102960dda
128 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, pointing to 'https://ttraff.club/pify?keyword=burn+it+down+cut+song'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, some hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary intent is to redirect users to malicious content, likely for phishing or malware delivery.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/pify?keyword=burn+it+down+cut+song
    • https://static.usrfiles.com/ugd/b8c837_a855fcab3217404f9446bcf89fbb67c8.pdf
    • https://static.usrfiles.com/ugd/8da65f_849df8686dbc40c0804b1ce780e9ed3c.pdf
    • https://static.usrfiles.com/ugd/b73feb_64ad10dc5c4941789deffb8b2adf2f8a.pdf
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/16720541674.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/cashing_up_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/38456218302.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/22069744413.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2208/files/82657639005.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/47119339184.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/8862405707.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43561311815.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/lovopegabamemubule.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3117/files/doleposuvakepowusajame.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/80587666475.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/68083685654.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_off00004797.bin
bc1ba673651f219493fbd24b77986915adfec48f77d2f0a3d3f6f558408ad3f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4797 4772 bytes
font_01_sfnt_off000057e7.bin
d99913308f58e993eac82ceab399a1724bec3190040e1187623e701d2087cd71
pdf-font-stream PDF embedded font (sfnt) at offset 0x57E7 10004 bytes
font_02_sfnt_off00007967.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7967 4324 bytes