Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a837eff3288a02…

MALICIOUS

PDF

48.1 KB Created: 2020-08-21 23:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fc3d932d950d248c086123e9279cc9f SHA-1: 2a7bd1a9d0bb7154091e2354c10e134f812033c2 SHA-256: 36a837eff3288a024add01f317b4787a9937b32ab5b2e36f68a9c9181953b825
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Baldi's Basics' and the malicious URL, suggesting a lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. 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=baldi%2527+s+basics+free++mod
    • http://files.atruechristian.com/uploads/1/3/0/8/130813042/solotub_wokuwu_regitopedolalib_garorijogapowuz.pdf
    • http://webed.moodyplumbinginc.com/uploads/1/3/1/4/131438044/3458667.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/88969779520.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6923/3557/files/asymptomatic_bacteriuria_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6212/files/82842776995.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/99136946552.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/23586166733.pdf
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/varicose_vein_examination.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/49993320800.pdf
    • https://cdn.shopify.com/s/files/1/0450/4502/2870/files/fuxog.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/wurujegutero.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/lesezuzodilojek.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_off00006770.bin
bec031dc8562a4c6b6761b6f12af223377bb873a43afb907535498cca635a9fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 5392 bytes
font_01_sfnt_off000079a6.bin
451d8391d0a5d099b5bd30a2e2f16821dee389b7d87fe788303e616fbf354be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A6 10560 bytes
font_02_sfnt_off00009db4.bin
91c92fab729f552433758475f1ecf6a366c66c74ae6b4dd9e31a9a0100f2b42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB4 16332 bytes

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