Malicious PDF — malware analysis report

Static analysis result for SHA-256 634f34f1f189f33b…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 09:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60eea1b5ae8f7c8b683eb50a8fc43818 SHA-1: 963485e9b2ac0e079d64132a3211c12b015c11c8 SHA-256: 634f34f1f189f33b2acaf3cd4b81a597893f39231edcd6ba1e2e037e612d25ff
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ttraff.com/wix?keyword=to+chicago+and+back+aleko+konstantinov+pdf, which is flagged as a malicious redirector. This suggests the document is designed to lead users to potentially harmful content through a link farm.

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.com/wix?keyword=to+chicago+and+back+aleko+konstantinov+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ca300b_066206880bef47048b436fbdfd711c24.pdf
    • https://static.usrfiles.com/ugd/1a89c8_7727055dcfdc40ebaa7b26b4576e9f76.pdf
    • https://static.usrfiles.com/ugd/b8c837_73d44f7e83164624909aa3b40919c01f.pdf
    • https://static.usrfiles.com/ugd/3826db_c9915b968787429b9af43611e3a45e76.pdf
    • https://static.usrfiles.com/ugd/6908d7_d3b9f2c5095f48b98fd15c8e751bc00a.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/76930401849.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/34786127039.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/vevibevimusipeluwokigeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/55247282922.pdf
    • https://cdn.shopify.com/s/files/1/0447/0561/1930/files/fernando_pessoa_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/83657030260.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/55475400603.pdf
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/73392999291.pdf
    • https://cdn.shopify.com/s/files/1/0435/7865/4883/files/kazepigiwat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/sufosikiguweminoxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1440/3742/files/dunev.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_off00006259.bin
1f956aef7c17c42df263cded26e23baeca671abe4e6b7567c76fea5185002887
pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 5536 bytes
font_01_sfnt_off0000752e.bin
33fa904ee666497a9a10c20f5e721c175dbc1f60c082b49c9df4a3b289a025a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x752E 10260 bytes