Malicious PDF — malware analysis report

Static analysis result for SHA-256 70766ff2f970e74b…

MALICIOUS

PDF

47.3 KB Created: 2020-09-16 20:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26a759f1da3a51b271aaea9d00412111 SHA-1: 5971b79cfe925cf92f73542c0b4e55c5ff9a0d87 SHA-256: 70766ff2f970e74be8425aedada477d19bf268a12c87a3d5e251b797427559ff
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=poema+de+te+quiero+mucho+mi+amor'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on filesusr.com. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.club/wix?keyword=poema+de+te+quiero+mucho+mi+amor
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a517046-1808-413d-8297-1dd08b4e50d9.filesusr.com/ugd/7d1dc9_492420579ab740b4b65719a695ccc41d.pdf?index=true
    • https://9f5ad3b4-79fc-4c62-b83b-ab833c9e9434.filesusr.com/ugd/96564c_19e261b9539c4c9da25ff1852889a0ae.pdf?index=true
    • https://1d908fb7-b4d9-46af-9f8c-fe9840b95dcf.filesusr.com/ugd/ce4b7c_f444532061e142d18ce793d3c3f7036b.pdf?index=true
    • https://4fe860d2-990c-49eb-b994-e077f3673e42.filesusr.com/ugd/35f767_cdb5fabeb8e44e0c9189b6df97658522.pdf?index=true
    • https://ae66d90f-821f-419c-8caa-13ddf8204ce6.filesusr.com/ugd/1cc777_1f5bffac47c649538c7524aba710cb26.pdf?index=true
    • https://cf224084-ad22-4eeb-a309-eade95647fee.filesusr.com/ugd/3db607_b24d225a587f4f4b98b9a98ece7d51c3.pdf?index=true
    • https://7c8bfc6a-5158-4c43-a792-f6bb8122b648.filesusr.com/ugd/e50c99_e6418d7ccdd54010aeef84fd86b39645.pdf?index=true
    • https://a7feac66-0005-4dd1-a8fd-faceb9269f55.filesusr.com/ugd/5f5755_076f169e5fd047ffacd2b6d8da7ae478.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/bujumenadilidewukufosa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3968/5799/files/satidabekimawege.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8541/files/performance_appraisal_objectives_for_personal_assistant.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/filuwur.pdf
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/madigelurek.pdf
    • https://d1572b91-d079-4e52-a210-1f56706c7c95.filesusr.com/ugd/370ea2_7fa53fd11e6f4d8eafb2334cebaef351.pdf?index=true
    • https://445d226a-dde1-41b3-9045-302692bb9bf6.filesusr.com/ugd/baef12_eb2f3792c56443ea81997c9a35fd6445.pdf?index=true
    • https://6e488c02-77d3-4f53-afe2-46942bca33c5.filesusr.com/ugd/3f80ec_3de9dc66ce094d9eb8ea1f8c160b7dbe.pdf?index=true
    • https://e583d1a6-8096-4ceb-a5ee-e813418032db.filesusr.com/ugd/de60da_793eca6e015d41e4aa973fd206a89fa9.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000653e.bin
8b1ddf1aa1a9cf228f2519e817e9d811a34692abc62745b3920c1ae759f042d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 5096 bytes
font_01_sfnt_off0000765d.bin
de383b9133bb48ef36fc510ec29f487a61cea1520f805c6575f9b6492572eff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 10548 bytes
font_02_sfnt_off000098a5.bin
226a8e4e528c820945b068501793868e9b71e899c703a7ad804f9a2f424011a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A5 16384 bytes

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