Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8d6b5f713dce44…

MALICIOUS

PDF

48.5 KB Created: 2020-09-07 14:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08d16bdc50c75418ae10f40d03933a68 SHA-1: 2da1b0004d6de4bb4bff6d91a3f2ddfdfa234ca2 SHA-256: ac8d6b5f713dce44c86a50347b4ccb319a824e13fe6c65667ee1e9e02f4c4ae3
152 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, pointing to 'https://ttraff.me/wix?keyword=pastel+template+powerpoint'. This URL is presented within the document body, suggesting a lure to trick users into clicking it. The ML classifier also strongly flagged this PDF as malicious. The document's content and structure indicate it's designed to drive traffic to this malicious site.

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.me/wix?keyword=pastel+template+powerpoint
    • https://static.usrfiles.com/ugd/ae059d_828b192b5e0d4987a76ae212ded9b0e1.pdf
    • https://static.usrfiles.com/ugd/d01287_764846401d63484c9865155ab43d5733.pdf
    • https://static.usrfiles.com/ugd/b8c837_375a05807ce04b289c25bb17c0fdcfbd.pdf
    • https://static.usrfiles.com/ugd/87d215_ad809b537f5b47608650b057542c7a39.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_a0282037360845f393fc69c1afad778e.pdf
    • https://static.usrfiles.com/ugd/b8c837_da5208c95279464f8ddee75f4edd6cd7.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_657e7380cea9496487fc30e1b8c2daef.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/39_clues_book_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/a._n._m_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/20835677093.pdf
    • https://cdn.shopify.com/s/files/1/0437/6569/4613/files/jipunuxederojusubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15518423203.pdf
    • https://cdn.shopify.com/s/files/1/0434/4545/2967/files/18520362144.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/48167444108.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e5.bin
923b5983a6b9b58c81166d4e31682c81ea32cd383d744c4cde58fc8c57c2c9f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5 4844 bytes
font_01_sfnt_off00007539.bin
083dbae029c4de47ac63fef7e774980313a00ffc4527a7f11972c88a012a9605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7539 6044 bytes
font_02_sfnt_off000084d4.bin
611579ce1c5c96c72d756dcaa5932422a279fd5ee9c1895da75a1f5f52f9976d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D4 9796 bytes
font_03_sfnt_off0000a658.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA658 4324 bytes

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