Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c6089a374acc18…

MALICIOUS

PDF

63.5 KB Created: 2020-07-30 18:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ef728692bf40823ab78a3f32cb25a4d SHA-1: a1ad1f3d5d6d71b3a58429419bf98e982bbbbc7f SHA-256: 64c6089a374acc188d5bae549d7adcf01e46b344fc3fa2cd7a64376963f0381e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious content. Additionally, the document hosts a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=neutrinoless+double+beta+decay+pdf
    • http://files.christianpensel.com/uploads/1/3/1/0/131069886/xawimokixixo.pdf
    • http://files.kelseymedeiros.com/uploads/1/3/2/6/132682676/198ed651381.pdf
    • http://files.bbartbyangelica.com/uploads/1/3/0/8/130813732/xabevi-xokidepagelele-rikenureliw-fugijada.pdf
    • http://files.azhealthpath.com/uploads/1/3/1/6/131606159/vutunakasorexex-xabofapogakoxi-bemufo-fuparofaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/53923279452.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/bulagifabesarex.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/kanulijinizitanigodegowad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/wokobuxamemilogazukunixor.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/94115204708.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/559093088.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/75557329538.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0298/files/gezejakupone.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/16736175209.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/97605055148.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_off0000a3dc.bin
e34e07da06ace70368d2029dd97a817667671debd323ec7cffdd024d0b586564		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DC 5240 bytes
font_01_sfnt_off0000b5c2.bin
34d86dc9481ad38d1a1c7ac9fbf8ebaa60acd69c36bec2e3f45b1eebf3a758d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C2 10960 bytes
font_02_sfnt_off0000db80.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB80 16036 bytes

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