Malicious PDF — malware analysis report

Static analysis result for SHA-256 075ef903764162dc…

MALICIOUS

PDF

41.2 KB Created: 2020-09-21 02:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6025ce3f49bfb1a03c6ffbe54ec9e3a SHA-1: 09cef04445dcb133c3cae9db53a9b2488e33d68c SHA-256: 075ef903764162dc83999afdc5aa70f74f451396325e047715ca0344a278188e
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of multiple PDF links also indicates a link farm strategy, likely for SEO poisoning or distributing further malicious 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=media+mediana+y+moda+datos+agrupados
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b90fff5-be74-4c0e-85d8-473b0ef1ca68.filesusr.com/ugd/296484_53fe368bda9f4cf0a9491dc0ad287372.pdf?index=true
    • https://ecf2bba0-e11f-40c2-9517-8e2a2616109a.filesusr.com/ugd/a32c20_7ff612866ec74293b95f9942d6759b97.pdf?index=true
    • https://6bdce608-043c-4c36-8cc2-4cd4fa65cc2c.filesusr.com/ugd/eddc50_090eddbee5184521afd6a63b5eebff19.pdf?index=true
    • https://e44fcc0a-3fcf-425a-85ee-1b6adba410fa.filesusr.com/ugd/bf0735_32770aa41b174bcd92e175e51ff78e8e.pdf?index=true
    • https://d01b4a83-7ccb-44ff-bae1-6ea74abb9477.filesusr.com/ugd/8e9e2f_0741604e552d464f8f0621a67ee35dc4.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/retugibulorujesa.pdf
    • https://cdn.shopify.com/s/files/1/0482/4632/5400/files/lipiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/pakalujepisixizipaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/vuxomufagatafuruseroge.pdf
    • https://b9f4d598-88ea-4b0f-a152-d669796fe080.filesusr.com/ugd/17159d_ef4f103fba074ea9bb4fb7a2df77944c.pdf?index=true
    • https://cdb487e7-8608-4a08-a0c9-379cae85db9e.filesusr.com/ugd/54dfea_339dbf72c6af40b19a1660f90054ca0b.pdf?index=true
    • https://5eb4cf8b-3dc3-4585-8198-dd61a0d27aba.filesusr.com/ugd/3bcfef_2c829e61c1864b13bc99a9a2fa5cb694.pdf?index=true
    • https://800d4af5-0bca-4278-b7f4-64581677f542.filesusr.com/ugd/47b1e8_f6497f0514b044e1ae2400730bf5b60d.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000615e.bin
6eb0706a48d402a5e62cdc21df5f3d1a7391cecc9c3a8aa9c7879a41fc165b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615E 5356 bytes
font_01_sfnt_off00007397.bin
ec78a78518856d0476260351320ff5d2913917307f7c2abc37624430bcbfc9ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 10696 bytes

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