Malicious PDF — malware analysis report

Static analysis result for SHA-256 036c34e3b4188ba4…

MALICIOUS

PDF

49.0 KB Created: 2020-08-02 05:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f80559edf3553ef413556fb6f8148d88 SHA-1: 8dfe945811bf030b54ae5ebf0b01ff2a5028005d SHA-256: 036c34e3b4188ba4e24ef52d7a842325c782f125d4b84d1cb871f7c549e5ad8b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector leading to 'ttraff.cc'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute malicious content or engage in SEO manipulation. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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.cc/pify?keyword=edz+resource+detector
    • http://files.jennifergrayphd.com/uploads/1/3/0/7/130775897/sewuzugizo.pdf
    • http://files.gracpiacenza.com/uploads/1/3/0/8/130814121/jilevalunelelatu.pdf
    • http://files.thebracketpros.ca/uploads/1/3/1/3/131384300/b4a371554.pdf
    • http://files.canadianculinaryinstitute.ca/uploads/1/3/1/3/131398406/76cbb0cde.pdf
    • http://files.tonymesarealestateschool.com/uploads/1/3/1/0/131069824/74102a6305a0d5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/58721888832.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/merck_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/15644379867.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/vuzudoluruwakawej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/xewajigemaxuguvudok.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/biwunatop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/9901449768.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/57899579170.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/65576898719.pdf
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/too_many_items_mod_1._7._10.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_off00006c1c.bin
72b157cc866a2e13d7583fcb79d0ff7ff2289dc685ff41b5d083bb9aef5a256f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1C 4428 bytes
font_01_sfnt_off00007b3e.bin
436301c907e4d7333ba9cc8ce5443f742a13e24658ecd98a77cca07eb8aba302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3E 13968 bytes
font_02_sfnt_off0000a7c0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C0 4324 bytes

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