Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b28b01c875bfae…

MALICIOUS

PDF

43.0 KB Created: 2020-09-02 04:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f99ea2a029293aab55b6afa4e7e2ac4d SHA-1: 3630fc8f5f05f8266eed14c778a0bbf90d277f98 SHA-256: 04b28b01c875bfaee6328bc3e8e14149836c4116053fbb10a5e2634cb4ac5080
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, identified as a link farm, with one prominent link pointing to a known malicious redirector. The document body itself contains the same malicious URL and numerous other links hosted on Shopify and other platforms, suggesting an attempt to manipulate search engine results or direct users to malicious content. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly indicate a malicious intent to redirect users.

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=word+genius+answers+where+in+the+world
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/nerofozafusajafixamasigax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5237/files/blowfish_encryption_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0430/5243/3557/files/83852086679.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/seguwagafit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8204/6869/files/tratamiento_farmacologico_para_artritis_reumatoide.pdf
    • https://static.usrfiles.com/ugd/a107db_8205bc26abcf4445a3bb27950c175401.pdf
    • https://static.usrfiles.com/ugd/f103bb_6c5ed417efc94dcdbc07249c46e9636d.pdf
    • https://static.usrfiles.com/ugd/685707_e09f5f2434de4a6696acf8b02d013b08.pdf
    • https://static.usrfiles.com/ugd/b65acf_dea038f68c6949eca8957f1a6f9b958e.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9280/files/juxoko.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/majikozasogake.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/astrology_books_in_gujarati_free_download.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_off00005c80.bin
4fa42f03cc938be89c7accd071bedf426ce599acc46acced656b275163317c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 5072 bytes
font_01_sfnt_off00006dd2.bin
5fd5704e386835f7ea60807025fb263105e578f8d0426fd6b8fecaa5f1db01e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD2 10128 bytes
font_02_sfnt_off0000907a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907A 4324 bytes

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