Malicious PDF — malware analysis report

Static analysis result for SHA-256 7999240ac36f7476…

MALICIOUS

PDF

36.6 KB Created: 2020-08-31 02:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d097286faf8d724563d5e8f432c728a9 SHA-1: 41ed426dae6044ad606fbd119a15af659e840357 SHA-256: 7999240ac36f74764cc3d163a419add55bf9d6dbe06246d690317cfa8cb0366c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link pointing to 'ttraff.cc', which is flagged as malicious infrastructure. Additionally, it hosts a large number of external PDF links, many of which are benign Shopify links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the embedded link is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=summer+bath+center+and+shower+instructions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/adobe_photoshop_sinhala_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/zoriwodedofapuvuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/29767834446.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/xuvodowobenemoxodumiwix.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/23845228875.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/blayzbloo_nds_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/97260677238.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/94021544682.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/1317635531.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/famexeza.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/nijakawerumemiratosag.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/diferencia_entre_catabolismo_y_anabolismo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/nabatuminuvimekufenin.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/the_real_book_6th_edition_free.pdf
    • https://static.usrfiles.com/ugd/225520_f144813392c14782a88e48d4ff8e0175.pdf
    • https://static.usrfiles.com/ugd/b8c837_f97fa90c669740a3bcc3e42ca525cfbf.pdf
    • https://static.usrfiles.com/ugd/87d215_248fee79434f4c54a86bbc787b21a82a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a4506a47f6047d0a94f367898079fad.pdf
    • https://static.usrfiles.com/ugd/b8c837_9da6157660044a06930c73ded686fa4e.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052e5.bin
f7ae18c8c4c69a95901d8ff4ca38dab3b2e0723e8df2553deb8e0601b92aed77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E5 5480 bytes
font_01_sfnt_off00006563.bin
9ca7f91f6bf85bb3a73a09f4b65557acbde3b9febf4124e9cad8d9c7ba8dc2f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 9392 bytes

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