Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c79bfde16ced0c4…

MALICIOUS

PDF

49.2 KB Created: 2020-08-30 03:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 015f446fd254a6edc4a16300c9a62305 SHA-1: d8e6074d6ed120e11a5a1a07f25cc2502cfc2321 SHA-256: 0c79bfde16ced0c4d58b8ce6e93397304aba928bde714010f1b72e5457858df8
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, appears to contain keywords related to book genres and URLs, suggesting a lure to a malicious site. The presence of embedded links and the heuristic firing for 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate an attempt to redirect the user to malicious infrastructure.

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=silence+of+the+lambs+book+genre
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a5d7dc1cfffc4c32bd88f0a002258f45.pdf
    • https://static.usrfiles.com/ugd/409ca8_df9b05a7d1b842c58f1a9fa5579a3647.pdf
    • https://static.usrfiles.com/ugd/77d535_cf18138eda2a48d99f58d1fbba6b9381.pdf
    • https://static.usrfiles.com/ugd/97634b_48ea304fbbcd4caab6f7586dff39a9a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d73749051f7d4100bd8489917850ba5c.pdf
    • https://static.usrfiles.com/ugd/76156b_5df1ec6954e341d78ff6a122bb4053f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_12cdad824b15451aa7f3ac4998643da9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0331eb4ee9540348f9be31056ac4d6c.pdf
    • https://static.usrfiles.com/ugd/d78803_d12b7a4099274a5984ddce84e562d7d4.pdf
    • https://static.usrfiles.com/ugd/43d598_3bd77ebf32c1466ebe0bf298532fb9a2.pdf
    • https://static.usrfiles.com/ugd/97634b_f94dbe97d2934831aff8e9d9022bded6.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/rig_veda_samhita_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/beres_hammond_albums.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1871/files/20701768097.pdf
    • https://cdn.shopify.com/s/files/1/0460/1590/5951/files/bajrangi_bhaijaan_video_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/pawozomofoxis.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067d5.bin
93cbe4b892b48a2bfe0c3b85ad49de9bd4b85d49c4e068f49ffdca45f9f0b0cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D5 5600 bytes
font_01_sfnt_off00007aab.bin
7abc681079208431b57fd9ad6de7898150c3e78402e5fdd1887812a602c667da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAB 10156 bytes
font_02_sfnt_off00009da6.bin
7f61601a7f9234f3261f8a4c6ac2586a999a20ec6be89ff72313fd3fcefcdd5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA6 17276 bytes

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