Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3bd00ec63dcb86…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 07:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cca1e978744e5a9aec9ad66b2cf3afb7 SHA-1: f19c0f89f9bbd6deffd9c04f35212607b1770166 SHA-256: db3bd00ec63dcb86311bf78e663c52f6be1e6c7fb6a3321671c1e56939f7bb05
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on 'static.usrfiles.com' and 'cdn.shopify.com'. The ML classifier also flagged this PDF with high confidence. The presence of the malicious redirector suggests an attempt to lure users to a harmful destination, likely for phishing or malware 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=borgsjo+ikea+uk
    • https://static.usrfiles.com/ugd/0f5b72_85b2e988f8db41948603522bbecedc0e.pdf
    • https://static.usrfiles.com/ugd/b444d4_a5cd7479cc1f40c1a63f7a6f51449fe6.pdf
    • https://static.usrfiles.com/ugd/fe83c3_167a1be946544733ad39405a35347034.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/vuzufuwowifel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/mugakekibefuginelugaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/59166378728.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/pigenetomopaj.pdf
    • https://static.usrfiles.com/ugd/7e6083_55227ccf001c4d89b46b95436a7dfa5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5cd443c79724641a86ad40e51ef8375.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1c45884a71143b18055d956689e6f83.pdf
    • https://static.usrfiles.com/ugd/b8c837_94ef65766b72413da4ffe1e51e63d629.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/gigilebovelul.pdf
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/wonamazuvagujaviza.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ce.bin
30c0de2ed1d05467a8f6dd6b0fef4ce5ffc203859b0d5e3c47ce954363a88fe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x53CE 5012 bytes
font_01_sfnt_off000064f3.bin
a5f12f531460591f7fa6aa4279c86af875b1705c670162acd7cdd0cd172cc4ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 9924 bytes