Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8e7a8a0f096c98…

MALICIOUS

PDF

46.0 KB Created: 2020-09-02 22:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efac132de2a0d1898a15b60cf8ab05a5 SHA-1: 05977b21edababb3a4806675fcbc38d19b6f3e51 SHA-256: 6d8e7a8a0f096c9898208865d79be31085d065f429a475c62b7d75b9b48ae4e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=adrenochrome+movie+parents+guide`. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure under the guise of providing a movie guide. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=adrenochrome+movie+parents+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/23099454331.pdf
    • https://cdn.shopify.com/s/files/1/0432/5087/6580/files/the_spectacular_now_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/apprendre_l_espagnol_assimil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/36898228139.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbe712cf79044c0db5f095efe17b8408.pdf
    • https://static.usrfiles.com/ugd/756799_9db9eba7fbe44a5a8b1e5a4d45534977.pdf
    • https://static.usrfiles.com/ugd/b11f6d_8ab97ad8e42349eda53c559f19b171e5.pdf
    • https://static.usrfiles.com/ugd/4117a9_59d1066b89504e9e89f72d9d742df9cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7318f5f86d74ce6b90b071dcefc3fb6.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_0f5d3fc167834df5b72f931931b74dc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_71b25bbc11e94eb78bd48f2cc8be4b09.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_b0bc87e5d3064bf1be450044be2d3598.pdf
    • https://static.usrfiles.com/ugd/740d8c_9a3e12318d154dbea850c7cd23c84037.pdf
    • https://static.usrfiles.com/ugd/93c935_f667f13238b640e7bf96fbaf168f5f3c.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_off00006843.bin
d8611e6a22f8dc1158dccecf77a5fbf4ac63cf3da2dc9e1594a764b684f1c736		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 5384 bytes
font_01_sfnt_off00007a60.bin
fe8bd92366bca6bfd42a8b18a727acee3007cc835e6cafe33bcd5e47d64a3b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 10176 bytes
font_02_sfnt_off00009cda.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDA 4324 bytes

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