Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0d75ae090c2aff…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 02:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8314d20b9bfe38bd4bdd4d58a29be581 SHA-1: 53c489845403d700bc03c3cdaedf283e815639fa SHA-256: 5d0d75ae090c2aff67db6baca79d3ba4fc924f457f5b34b96b1c9c2aa35bae5f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily garbled, contains the same URL. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.ru/wix?keyword=cuantas+veces+siendo+ni%25C3%25B1o+te+rece+letra
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/d55797_7affe04cf5ea46078bb52125624f024c.pdf
    • https://static.usrfiles.com/ugd/cf14a4_725b87c1bc7345e680ba6b4188c8553d.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_e2ac129fe7194076af895d7bc563781a.pdf
    • https://static.usrfiles.com/ugd/b8c837_19ee4eedaeb04954a20a3e07c9d8c732.pdf
    • https://static.usrfiles.com/ugd/b8c837_99b8d2701dec48bc942afa41628ccfdb.pdf
    • https://cdn.shopify.com/s/files/1/0435/7524/7003/files/cambridge_maths_year_11_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/1429410433.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/novovodunugek.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/destination_b1_bn_p.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/rosib.pdf
    • https://static.usrfiles.com/ugd/93c935_d88f0f0c8bae40cd8c0c4b0118376a0d.pdf
    • https://static.usrfiles.com/ugd/ba3095_8167e758fb9e4e4a9036ca28e8da8638.pdf
    • https://static.usrfiles.com/ugd/93c935_b26519adaf384e62864ce061c549d998.pdf
    • https://static.usrfiles.com/ugd/50c35f_35d7eaa1926d4ebeba74d567a5a65e81.pdf
    • https://static.usrfiles.com/ugd/cac9e4_7b676c49f40844a585a979d948c9bf44.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000580e.bin
37699065882759b9a03bf20e82923d84cc74839fa0de06f372503b9207107915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580E 5108 bytes
font_01_sfnt_off00006937.bin
370ced60b7711bf36c0f52909f2b2f6d7847e0c1228210288bbad40c9cc79bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 12024 bytes
font_02_sfnt_off00008ebc.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBC 4324 bytes

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