Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e8475372c528dd…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 15:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61412af799e410c2fa0bd7c1ec6af64a SHA-1: 1a0ee20b3c985f491268e4b28457403568dc86ca SHA-256: 65e8475372c528dddf49a39e260c187c5ac3404045290cf0a53234a7b5d96712
154 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it is designed to host a large number of links. The primary malicious URL identified is https://ttraff.com/wix?keyword=harry+potter+20th+anniversary+editio, which likely serves as a redirector to further malicious content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=harry+potter+20th+anniversary+editio
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/ar_rahman_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/43031987041.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/93458104178.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/lodijotobobezoxeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/hfsa_heart_failure_guidelines.pdf
    • https://static.usrfiles.com/ugd/43d598_58204c9494de44cdb2bfbf1a27a2f7a9.pdf
    • https://static.usrfiles.com/ugd/158fb9_6506fe5f439a46b3bb0a9e9f4c32e8ce.pdf
    • https://static.usrfiles.com/ugd/93971e_f1c92649bec34a4981d25b7675b50b72.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a3b37f170d244a4b7b7ee49d1f1d659.pdf
    • https://static.usrfiles.com/ugd/23e9be_d82e984451a54047ba8effc89363ffa2.pdf
    • https://static.usrfiles.com/ugd/f967ac_99a66376e8f94bfabe80e8f1d3fdb7ea.pdf
    • https://static.usrfiles.com/ugd/c068f8_596a541fdb554b358e3965e6630c6f1b.pdf
    • https://static.usrfiles.com/ugd/1df9ea_05b0360f7b794c879f945eb53595835e.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_90f1fd03b7534347a2201a06b3cabb1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b19ae811a6e5425888552086771aff93.pdf
    • https://static.usrfiles.com/ugd/162fe6_d5202ea192f34e1ba29e1def74be7902.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb6fca7f18444a6a859001c0166b6698.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_off000066f1.bin
09b81c0d1291aaa31967b735ca7a0a61a4f97d8962eb9addd4532cf9215fe63c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F1 5412 bytes
font_01_sfnt_off0000795a.bin
60e35122e23a81e9317b80e791d2996ee0c1bfd7f70b72a5a04572a43eb91cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 10508 bytes

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