Malicious PDF — malware analysis report

Static analysis result for SHA-256 598b7fd735648611…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 11:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde5516ca8f0a929b2ec1704f30029d7 SHA-1: dde1b111ea592aee866f13535e2e2977266aa3c9 SHA-256: 598b7fd73564861155b388077ccc8093700fef57f23b0b386e65ebe3595ac6e3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm SEO tactic to obscure the malicious redirector. No scripts were extracted, and the PDF structure itself does not indicate specific exploit techniques beyond the malicious link.

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/pify?keyword=les+analyses+m%25C3%25A9dicales+du+sang+pdf
    • http://files.seanhuttonmusic.com/uploads/1/3/2/6/132682655/3cda6b7f4f1a1a1.pdf
    • http://files.rotaryaviation.com/uploads/1/3/1/8/131872021/nizavasapavo.pdf
    • http://vupol.millhousefloristry.co.uk/uploads/1/3/0/8/130814575/c114f9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0430/9680/1434/files/ontology_in_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/7713194582.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/87662412242.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/mepetaxikamuvatupavu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/james_stewart_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/how_to_install_act_for_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/mass_effect_andromeda_cheat_engine.pdf
    • https://cdn.shopify.com/s/files/1/0428/3455/9143/files/dumewigoduroj.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/49288227154.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/2142580866.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b8c.bin
9ed94f51beb870ef238f24c5578e1f798739f2c73d67e746cd5e66c1b69a6b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8C 5564 bytes
font_01_sfnt_off00006e39.bin
bc9a36f2c8b589ec5dc87893aa7fa8d1afc406f3f400e2dc7f171f4a5c4c49e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 11924 bytes

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