Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b5b17b7e7333af2…

MALICIOUS

PDF

34.0 KB Created: 2020-08-29 18:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ccf2191f3ae2442e424f14729b3df84 SHA-1: 94dce97bf2e36af21074e766d1a2f3b4d4273aef SHA-256: 0b5b17b7e7333af21feb4c087dabf539b06a50dd0e79d39570824656b0a1a0ce
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a vehicle owner's manual, suggesting a lure to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely for phishing or malware distribution.

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=2014+hyundai+santa+fe+sport+owners+manual+canada
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/13227082999.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0666/files/broken_blueprint_book.pdf
    • https://cdn.shopify.com/s/files/1/0463/6285/3531/files/mudirov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/metawosofojux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/69360354364.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/online_magazine_templates.pdf
    • https://static.usrfiles.com/ugd/b8c837_308378179e064c0ca42ca37473a9b846.pdf
    • https://static.usrfiles.com/ugd/b8c837_9624d14830c74476a1917027b3de8b7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_79498a9681a742d5ad474c77ba802910.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb6451e830434a869b0256e0a060551a.pdf
    • https://static.usrfiles.com/ugd/b8c837_62b740fac0af4c50b7a868af692fb5e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_260a36ff4bd146d7914a3785e69143f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8766446a74dd4406a44874d7c1faf0f0.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_off00004b07.bin
907eb2812a229368e8f59ede6c57ae5a6281b0203ce23208411023a2bace0c3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B07 5908 bytes
font_01_sfnt_off00005f08.bin
a78783f6093f35c909747d89b634b2aace564ea777ba782205e36926dbfe3e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 8204 bytes