Malicious PDF — malware analysis report

Static analysis result for SHA-256 1082f8e18d652ee1…

MALICIOUS

PDF

49.5 KB Created: 2020-09-01 05:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ed4ee2109a0b403d2745e7275bf3224 SHA-1: 9bcb40f96d8a5940bd019558f02cc0332ba2d80d SHA-256: 1082f8e18d652ee1a7c22d42bf18534fc91d56f7e389e8e0380a4250b9bbed4c
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to redirect users. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/wix?keyword=nela+ticket+video+songs+free. The document body, though heavily obfuscated, also contains this URL and references to other PDFs, suggesting a phishing or scam attempt.

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.cc/wix?keyword=nela+ticket+video+songs+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3826db_2b9790c8e97748dbbb55ff1f014fdfb6.pdf
    • https://static.usrfiles.com/ugd/61b8bf_8379e61f0f6d40f88a006d62d2462104.pdf
    • https://static.usrfiles.com/ugd/48f461_c4b5267d3b9a4fbf8536a575b649299c.pdf
    • https://static.usrfiles.com/ugd/78c764_361334d85fe54fa5bd76a2e0fe63d446.pdf
    • https://static.usrfiles.com/ugd/fd30ac_3dff70ab2f414ab8a9d5992050c94474.pdf
    • https://static.usrfiles.com/ugd/1a89c8_a687702096a64e1098012f0d53c6ca4f.pdf
    • https://static.usrfiles.com/ugd/3aca14_36e210a2a85d483b8fda2470b9cbca43.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b872d4978ec428f9c84fd9f251eb11b.pdf
    • https://static.usrfiles.com/ugd/67f5f7_c8a01c631f6a49ccaac4ecba72ba3f3d.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_95d5b130f7974801a606cd90d265615a.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_off00007f68.bin
ba0f66d6dfabc1e24d827057211f4e92edc5b4bf520d6c90170d507b669f68fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F68 5284 bytes
font_01_sfnt_off0000917d.bin
57425f2cc72ae427a77983fc7179ec02fab6bccded2286e1dc19253eec5f7d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x917D 12236 bytes

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