Malicious PDF — malware analysis report

Static analysis result for SHA-256 449c73854ff321bb…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 09:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b344730c8cf915cba654d2e3c75cd8f3 SHA-1: d39123092255d7384572db7a394363b7247fc943 SHA-256: 449c73854ff321bb718b1825337b5ec8c35ce7382807fa2c894ad14e80c62eb6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to downloading content and the primary malicious URL. The presence of a link farm suggests an attempt to leverage SEO for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=2pm+go+crazy+download+free+song+mp3
    • https://static.usrfiles.com/ugd/b8c837_7ce02218c0b04519bd04a65a306c587e.pdf
    • https://static.usrfiles.com/ugd/b88e3d_97074005de23406a84c1d8a3d5a15d20.pdf
    • https://static.usrfiles.com/ugd/edb4a7_05243045f9114c7cae373492a193c73a.pdf
    • https://static.usrfiles.com/ugd/e2b09b_4ef941b7616f477bbda1588eb78172c1.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3775/files/fairy_tail_episode_141_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/kiditujowefeparorivow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/magic_chef_furnace.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://static.usrfiles.com/ugd/12f4eb_e3ecffe428fc417bae6db619d149f2d7.pdf
    • https://static.usrfiles.com/ugd/086daf_172bc5ec5d04410fbc7abd81120bfa13.pdf
    • https://static.usrfiles.com/ugd/b8c837_a586055689a44ff191ed48523f317cce.pdf
    • https://cdn.shopify.com/s/files/1/0463/3709/7889/files/80910674058.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/linear_guide_rails_and_blocks.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/16005866272.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f2a.bin
9e72045030e09f0f53e13df39a30db17013d86df31bd81099ed3c55345db73ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2A 4436 bytes
font_01_sfnt_off00005edc.bin
65b570d450ac6419396028669e642954b59d8b6b9d8469fb35f473dc202990ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDC 5920 bytes
font_02_sfnt_off0000730c.bin
767060ead05eafec6b0a45806601d69de173590158aacaef8241f32f12f041da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730C 15384 bytes

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