Malicious PDF — malware analysis report

Static analysis result for SHA-256 6878e7b522109ca3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 00:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d59fec957ae7d455c9bfe7c58974bc3e SHA-1: d545655b69e6f0aac2466bdca96f9f8776e5ac12 SHA-256: 6878e7b522109ca360ad717d8ff499e948dc2f5e76b4b53c3f579391a57e2a3b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. One prominent link, 'https://ttraff.com/wix?keyword=legendary+chests+conan+exiles', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure.

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=legendary+chests+conan+exiles
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a70e80a52f3a4c23bb7641c38ced28af.pdf
    • https://static.usrfiles.com/ugd/b8c837_039835a708814282a1dc5d2e04d0ec66.pdf
    • https://static.usrfiles.com/ugd/10e3af_364a289dd8954f66bdc56cb6a50e7b85.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad78fa24dd2d46dcaa99271bdc585643.pdf
    • https://static.usrfiles.com/ugd/1e4819_88674126694a4eb8baee2676cf428332.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/55849222687.pdf
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/99341803598.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/63883931636.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/6572788065.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4172/files/93041491290.pdf
    • https://cdn.shopify.com/s/files/1/0439/4965/4184/files/mezuzunujivarefufuramo.pdf
    • https://static.usrfiles.com/ugd/87d215_0d8a19ff12b94eaba6c6277154cc370d.pdf
    • https://static.usrfiles.com/ugd/b9801a_a3231f6353064d1bbd3443db26c911e8.pdf
    • https://static.usrfiles.com/ugd/5926b4_a5489d2731044cde85c3ed215661008d.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_off00006164.bin
7eca36566d31770fed9716e530c72447167ef8b729a4c32b5ec9e03ef1661172
pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 5312 bytes
font_01_sfnt_off0000737c.bin
9eb5888cdbdd2d058192bf53451c064dce4fff59af17f989a111b3e7f8269d9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 10204 bytes