Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdbcfd30ea5c5d8…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 08:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c0fa4bee37836ed6d094f944d60357d SHA-1: 632516e4ff7d454dca2fd4539767f4d716f01e02 SHA-256: 5bdbcfd30ea5c5d833584e730a440900d26d6ec2a7a8ea09d237949c9ee9d2e2
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.cc/wix?keyword=epreuve+e6+bts+sio+sisr'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is 'https://static.usrfiles.com/ugd/576447_03748106a7544ee8872c1f3aac63c64f.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain the malicious URL and references to academic content, suggesting a lure.

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=epreuve+e6+bts+sio+sisr
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/576447_03748106a7544ee8872c1f3aac63c64f.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_6032edae0e124ae6b4a26b234983d062.pdf
    • https://static.usrfiles.com/ugd/0adedf_d8943fa7a45143d2966ccba6cd505953.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa1f752720434b9f9ac4a1fb941376a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e23c022d67d34e72a2dcc95ceb99c577.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/45339628608.pdf
    • https://cdn.shopify.com/s/files/1/0432/3809/7051/files/definition_and_types_of_migration.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/rowofegowaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://static.usrfiles.com/ugd/bb13a2_b2ae4b4ee3374fad8b686a31c2bf8691.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5fdf1e2391744ed851fe6f5b12bb720.pdf
    • https://static.usrfiles.com/ugd/0a0016_8bdd21c69e9d456d9d434385e99a284b.pdf
    • https://static.usrfiles.com/ugd/b8c837_475ea5f403834e1c956264d8c682346e.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_1ae5e707d0814f4b852ffb72038593a6.pdf
    • https://cdn.shopify.com/s/files/1/0436/9419/4843/files/48019934795.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/enrique_iglesias_bailando_english_version_mp4.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_off00006472.bin
da1b188df7b61eaff72af0e64986327507bf6462e504e57d162e4e81b7e66fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 4884 bytes
font_01_sfnt_off00007522.bin
9c7f477e9f5c8a6a22b7a8a8a5f36905fa2d87fc58921611e69b9ffe790bfd57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7522 10120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.