Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd91d8b4b8b4f123…

MALICIOUS

PDF

37.0 KB Created: 2020-08-15 02:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025d1665d92536f214f5545a95b1fe7c SHA-1: 1cc068cb5bd4d37f6c2802948d5c809fb7d792a0 SHA-256: bd91d8b4b8b4f1232e694c5b3cbd7ef6f458b6a70b645dcf67e1f22c6948e57b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm and a critical redirector link pointing to ttraff.cc. The document body, though heavily obfuscated, contains the same malicious URL. This indicates a lure to a malicious site, likely for further exploitation or credential harvesting. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=free+pc+game+granny+in+paradise
    • http://files.carriagehousecinema.org/uploads/1/3/1/3/131381066/luburorep.pdf
    • http://files.signaturegames.eu/uploads/1/3/1/4/131438563/7672099.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/suvagave.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/95263914944.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/flex_banner_design_in_photoshop_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/59397299519.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/16506608841.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6437/files/nujijemagapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/fepotuzojorizumitizawara.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2957/files/yamaha_fjr1300_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5066/2053/files/xujipavuzuravupepozaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.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_off000052bc.bin
e39a51716568516ad837c3e764921598f48c9737b6764c86b28ca4ae40452728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BC 5416 bytes
font_01_sfnt_off00006513.bin
17ea84339256326c3160eb9ee4f1872e51c4071596930f72de25eeef940cce9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6513 10052 bytes

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