Malicious PDF — malware analysis report

Static analysis result for SHA-256 67227b60addafb8d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 04:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba73eb186c7c04dc91c0cd48606f35e2 SHA-1: 895c09925021b3aa2ff49c6387bf4b7b1ecc4116 SHA-256: 67227b60addafb8d7350c2992e659f2970afd573f84f2d08e9c63c58f316a437
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=frin+libro+completo'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded links and the redirector heuristic suggest an attempt to lead the user to a malicious site, likely for phishing or further payload delivery.

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=frin+libro+completo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5abee67d93264a0a8fa8ec8f88a3df11.pdf
    • https://static.usrfiles.com/ugd/9c0842_0be10e66abb943b296c9a1af390dc42e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c386b6eac7244b1864d68e86a4d93ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_baae777784bb4397a14ffd8809009b05.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f49d37fb594763bca7091127031944.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/ccna_cyber_ops_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0465/8724/8805/files/android_stopping_apps_running_in_background.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/the_courage_to_be_disliked_epub.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/xuwivigibipowebep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/rotevawefifixokugugo.pdf
    • https://cdn.shopify.com/s/files/1/0457/7371/7660/files/steuergesetz_basel_stadt.pdf
    • https://static.usrfiles.com/ugd/87b9a8_7869997dce3946e8b64e718febbe786a.pdf
    • https://static.usrfiles.com/ugd/b8c837_89cef761142c4c779db0111a0104eadd.pdf
    • https://static.usrfiles.com/ugd/111c46_70c1b821f93249fb8a0080c04af677a7.pdf
    • https://static.usrfiles.com/ugd/d5cf39_8ff825dba7684155954d9e11ccdbf455.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_off00005fc8.bin
4a5fdca3e475930615116c807fcbe679ab82a6ce4660b8e90455dfec1201b979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 4788 bytes
font_01_sfnt_off00006fea.bin
03d811130706a0beca9a56e7173707beb12ce248a7aee87f72a205b786586753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEA 10240 bytes

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