Malicious PDF — malware analysis report

Static analysis result for SHA-256 036a3af48d1a4258…

MALICIOUS

PDF

43.5 KB Created: 2020-08-31 08:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63165200eea5def536772692104be3b1 SHA-1: 75c64a4b6d622b25a4aedc9bcfaee5133d56229b SHA-256: 036a3af48d1a4258bfa4844bb5cbcafbc4b9c83b24a144a040ea572bf3889992
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body text, though partially garbled, includes phrases like 'we have primary tradelines for sale' and references to invoices, suggesting a phishing or scam lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=we+have+primary+tradelines+for+sale
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0aab01_7620d54f00454a9791085392faafbc17.pdf
    • https://static.usrfiles.com/ugd/b8c837_be7fa280f0f7406d832ece9bff050d7e.pdf
    • https://static.usrfiles.com/ugd/804ff6_61f4dde3ef0a4a989f141b11736d25b5.pdf
    • https://static.usrfiles.com/ugd/15cd4d_279dff4288b1436e9964ad133cdc2963.pdf
    • https://static.usrfiles.com/ugd/271e65_58c960f3d285428eb2e174da594fa8c8.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_4b587f02231642c886ac6f6e34dabc3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c16e7e82a8a5471ca89954a7bc6e9b93.pdf
    • https://static.usrfiles.com/ugd/b8c837_8647b3c843e949dc9afb1a4109e3314e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e324195a8bcd4261ada8195db2fe5441.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_3169bae1ed3445818706d28770798766.pdf
    • https://static.usrfiles.com/ugd/b8c837_132eb013f89043e59db09a7000f93195.pdf
    • https://static.usrfiles.com/ugd/5de1df_5213b0b2dd77486c95fe5a96028f26d1.pdf
    • https://static.usrfiles.com/ugd/eda9ba_4afc01f83b4d4f22baad1b7d0f4d91d2.pdf
    • https://static.usrfiles.com/ugd/e4a001_710c27b42f1f4e3e9a262f7fd7a90808.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_off00006a66.bin
45bb2111cc76ba37f3190acb565c69b2351a18d83cbf7b8e46293ae2e719b9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 5456 bytes
font_01_sfnt_off00007cec.bin
542eba1bda058c560e5501208c4b30e4fa80d6041e86cb4f1530015e042f44be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEC 10664 bytes

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