Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f5d413abadad25…

MALICIOUS

PDF

43.2 KB Created: 2020-08-30 08:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b993ef79e581ccaa4f0e5485cb70a8d1 SHA-1: 2f075d6803b3461212c61bac9ac100da24ef8f34 SHA-256: 53f5d413abadad251ee2b1831f2ea4fcad833c5da13619724cd27d6ff9f78229
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.cc/wix?keyword=no+man%2527+s+sky+exosuit+upgrade+guide`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on `cdn.shopify.com`. The document body, though heavily obfuscated, contains text related to a 'No man's sky exosuit upgrade guide' and the malicious redirector URL, suggesting a lure for phishing or malware distribution.

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.cc/wix?keyword=no+man%2527+s+sky+exosuit+upgrade+guide
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/vavuwarusemaporex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/50805296415.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/35747127574.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/23484732003.pdf
    • https://static.usrfiles.com/ugd/b8c837_beda5bda9c8546eb983ff3429a0cfebe.pdf
    • https://static.usrfiles.com/ugd/b8c837_f76e49bd4db54925b40a48ba9ca7779d.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/lincoln_ac_225_arc_welder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/how_to_send_a_screenshot.pdf
    • https://cdn.shopify.com/s/files/1/0434/7360/0678/files/notification_email_template_laravel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/59937381435.pdf
    • https://cdn.shopify.com/s/files/1/0438/4689/3730/files/74841669483.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_off00006b49.bin
63ff2f40967b745d6f1d6218a02243f9049f14e31f81d11b8402cde092c0f85f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B49 5484 bytes
font_01_sfnt_off00007dea.bin
d5be1b580c156f1e0c80434d157c97015be5f7b069e8a907f0084d8780839af3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEA 9992 bytes

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