Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b411cc9243e3118…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 09:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d9dc1b276cbf3f54013fb2731c7248a SHA-1: 570ef4ec53b66b3da9c9768d4cce0ff6545f6c38 SHA-256: 0b411cc9243e3118bc63c37f19f90cb927ae6833066c48e243bca43c2c3e42de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=bashan+quad+200cc+top+speed', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection tactic to distribute malicious content.

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=bashan+quad+200cc+top+speed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/dcfb95_da3f33ba6a404e99bd0999606cdf9113.pdf
    • https://static.usrfiles.com/ugd/f1d680_9685fc7655144314b1570bbce1d697a0.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_4939d3fe85b44b8cb9767cce99b6342a.pdf
    • https://static.usrfiles.com/ugd/5438e3_d85fb4d1c3b748069cf3583693b123d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_09e163782efa4afaade876bacddeddee.pdf
    • https://static.usrfiles.com/ugd/97634b_3282d0ee3bc642fea4fc1663853f3221.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2190803f6a4aa79018dbb087649e63.pdf
    • https://static.usrfiles.com/ugd/ae059d_e09fd610698747618b358df983adbddc.pdf
    • https://static.usrfiles.com/ugd/bf0735_491a741e646943de88b97a744728ac07.pdf
    • https://static.usrfiles.com/ugd/3f4b99_975f0380ecd54492ab391e82f70ec55c.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_0e5a47f26782409ea8f947bc4782a06a.pdf
    • https://cdn.shopify.com/s/files/1/0434/6052/6246/files/onimusha_trick_box.pdf
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/40491072418.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/abstract_reasoning_test_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4886/files/50960044605.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_off000066eb.bin
5d6b00b7c5d70b660addbeea6b6c508efb0b0bdce333af620a69ee53f3488c78
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EB 5480 bytes
font_01_sfnt_off0000797f.bin
b57b7c17f060c9316340d36941d669b46ca7e4b03e9601844b65e25c1c2aa584
pdf-font-stream PDF embedded font (sfnt) at offset 0x797F 9772 bytes