Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a6f3b0550f1b35…

MALICIOUS

PDF

39.9 KB Created: 2020-09-12 17:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eb9532f38561052073d5ed3109b06ec SHA-1: 37e878849b8eff7c7dd01386a54de7dfdea69907 SHA-256: e3a6f3b0550f1b35ed9d448e98adb515cd5a65a4077f47834c79dd7d2e3c7b68
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=google+app+store+apkmirror'. This URL is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The file also contains a large number of external PDF links, many pointing to static.usrfiles.com, which is flagged as a PDF link farm.

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=google+app+store+apkmirror
    • https://static.usrfiles.com/ugd/2ddd39_d0612dd30fd94f779b61938ae3dd1d72.pdf
    • https://static.usrfiles.com/ugd/d78803_108d7256e1bb4471b1d0bf16406b8888.pdf
    • https://static.usrfiles.com/ugd/368de4_9a6d18908f6c402b92bb42bd08b52c1d.pdf
    • https://static.usrfiles.com/ugd/3d7af5_680f843744d447008fb2d17459a4a320.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_47a8fbaba8024484a89ea91ea94dbe5f.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_29ba0e70738b4b458bf951275e4b4698.pdf
    • https://static.usrfiles.com/ugd/63022f_726936f666364fd9aba7ba6a8d3da449.pdf
    • https://cdn.shopify.com/s/files/1/0463/3971/9324/files/83765482435.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/74120217437.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_off00005f15.bin
1727497ff123a75b071012a8f342965fb7dda46bcae22820113f4eca1b029064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 5236 bytes
font_01_sfnt_off000070d7.bin
2c695a4590a6dd6ef39e408f07fa343ea1675f23f00bd838b262466068c89515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D7 10084 bytes

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