Malicious PDF — malware analysis report

Static analysis result for SHA-256 5132ff1fe4f7a0ef…

MALICIOUS

PDF

34.3 KB Created: 2020-08-31 10:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbc7c62b66320c9cfac9feca8a2682e SHA-1: 4e4bed1011ffe848ad9dac8b5843aad999a567d2 SHA-256: 5132ff1fe4f7a0ef91de20f86272ef5e5b989309a8d4eb93f5ca8c8fbf153cce
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as an LG manual. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful 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=lg+akb73655806+manual
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/real_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://static.usrfiles.com/ugd/b8c837_99b8d2701dec48bc942afa41628ccfdb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/widamajero.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/83862063093.pdf
    • https://static.usrfiles.com/ugd/2813e2_eaf6e8bd24e84b7ea66e3ddaea308443.pdf
    • https://static.usrfiles.com/ugd/3e9e83_78ec4e5c7c1d4a8f857f81e4b2faeae3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2fc01be6ca84681814b5d766f228403.pdf
    • https://static.usrfiles.com/ugd/0c41e7_491781e16dfa4412b32669d0a6f4b3a3.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_off000047b6.bin
bc0d9e67aef709397c88d4dbb845053480f6c9476855a06dcd710f6cafa95b85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47B6 5736 bytes
font_01_sfnt_off00005b32.bin
3d774ac50bf166aa443e92a393685c6fb909d1a187d72a5e622ae65ff152f1ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B32 9836 bytes

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