Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4993ef007b6098…

MALICIOUS

PDF

49.7 KB Created: 2020-09-06 23:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88344c53b6705e9e1c707161397a22a5 SHA-1: 093f2e474b26bbca4dc067e0dbf730e84c3d5c7e SHA-256: 5d4993ef007b6098e9b4c67d56b954713fd14fcc73455cf5827f54318a85561f
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://ttraff.club/wix?keyword=implosion+never+lose+hope+apk+and+obb', is flagged as a malicious redirector. The document body also contains numerous links to PDFs hosted on 'static.usrfiles.com', suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to potentially 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=implosion+never+lose+hope+apk+and+obb
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/238140_5b0ca3d7fde44f78a79143b2593a543b.pdf
    • https://static.usrfiles.com/ugd/77eba6_d1705677443146fb9ab048b830319a54.pdf
    • https://static.usrfiles.com/ugd/a31856_189f026978734e6888b44fb3236e6739.pdf
    • https://static.usrfiles.com/ugd/a86d68_94705f99c9a740e7b84a67fceedbfa46.pdf
    • https://static.usrfiles.com/ugd/595093_d41a5f80422643319be07c1384d50625.pdf
    • https://static.usrfiles.com/ugd/bfd78a_cdabd1cbcf7b4ed0b5b43af0c817244f.pdf
    • https://static.usrfiles.com/ugd/b4609a_f8daee6ba0ed4bceaa4ea50a64aa6cc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_58663ce709c448bca39a3026dc301f13.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_26037706edc7409db858d66650c610c4.pdf
    • https://static.usrfiles.com/ugd/affaa6_b58f3e29c4eb4d34b50fc272c005d60f.pdf
    • https://static.usrfiles.com/ugd/57c819_87fbeb6f68354ecfbc3f37b2727030a9.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/various_attributes_of_form_tag.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/nusewom.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/skoda_yeti_2020_brochure.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000618f.bin
e51b9ef7bb191e13dad9dfee177f550de40144372d1b74da6ad23d8b290a89ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 5108 bytes
font_01_sfnt_off000072a0.bin
92c450d3982cb7430d1bb1a7bb4d1d0b79d4f6d190701271390d3c22e81521fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A0 10248 bytes
font_02_sfnt_off000095f1.bin
fb14e7601b2f07dff4be2c03c9036dcb9663879821d68676073e5cb84f1b14fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F1 16244 bytes
font_03_sfnt_off0000ab4d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4D 4324 bytes

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