Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db05096131faed1…

MALICIOUS

PDF

38.3 KB Created: 2020-08-31 12:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd365aeef58fc33ebe391c4c1ecba1c SHA-1: 961b938919481d86bdc1d807817e9589819dacf4 SHA-256: 7db05096131faed1b4dcdb5190725485deaf8552c9a452912f70c864f484dc60
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to URLs, including the malicious one. The presence of numerous external links suggests an attempt to manipulate search engine results or lure users to malicious 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.com/wix?keyword=elif+batuman+the+possessed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/http_aka.ms_xboxsetup_laisse_comme.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/33380209873.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/fuzapudeva.pdf
    • https://static.usrfiles.com/ugd/b8c837_304c82db875343c7814cc21b1dfc30bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_936e6d706b1745e681c286eb4167454a.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/an_anthropologist_on_mars_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1916/4058/files/baldur_s_gate_2_enhanced_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/95527086547.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/yam_agrarian_reform_farmers_cooperative.pdf
    • https://static.usrfiles.com/ugd/b8c837_250c8889548e4b2fb66aed7fd1bd1af5.pdf
    • https://static.usrfiles.com/ugd/8d57bd_d62696e2c37645c9a121c6bd818abbcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8657dfc8d9494d70855fa76bb9c1a0e7.pdf
    • https://static.usrfiles.com/ugd/26938b_865c7f37eec74c6498958dc91d722d1e.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_off00005860.bin
9d845022c627832816e32221aa14f671640d584b40726eaf3b532d2abc95d938
pdf-font-stream PDF embedded font (sfnt) at offset 0x5860 5280 bytes
font_01_sfnt_off00006a24.bin
7c660b970555fbfd6ee227f7cf704ee82e20b7e5c5c5ec98dd40fc9d538de9f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 10148 bytes