Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b0bba361753675…

MALICIOUS

PDF

48.0 KB Created: 2020-08-25 18:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9b79e327c1c789addc0650f05151fdf SHA-1: 81e743e06e2fdd82598f274ded9a1688ed90458f SHA-256: d7b0bba3617536757da6475408f4ec8c1eca0121811719ad6ca2ff35cbd9aa3d
150 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site under the guise of downloading a game. The document body and heuristics indicate a link farm strategy, with numerous embedded links pointing to various PDF files, likely for SEO poisoning or to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=age+of+war+unblocked+hacked
    • http://files.blastpyro.com/uploads/1/3/1/4/131453917/retorazogikofefox.pdf
    • http://movajow.indianhoops.com/uploads/1/3/2/7/132710589/pipemojudun.pdf
    • https://cdn.shopify.com/s/files/1/0436/5585/6281/files/migo_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/1588/9050/files/formacion_de_boca_hoy_suplentes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/josurenadebosimasulad.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/st_john_ambulans_malaysia_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/69548032923.pdf
    • https://cdn.shopify.com/s/files/1/0440/8927/8616/files/best_self_journal_no_watermark.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/vabawufujep.pdf
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/chrome_os_usb_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/aha_bls_provider_manual_2020_free.pdf
    • https://cdn.shopify.com/s/files/1/0459/7219/3447/files/pros_on_why_school_uniforms_are_good.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_off00007d90.bin
23ccf88cd7f66280a8fa934e0b3d6413dec7e7d0d42c21784690641deb242476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D90 5388 bytes
font_01_sfnt_off00008ff0.bin
ec865df133960c6ad22286e5e1be594bf067e8b58f52999603a0f0ff389f0df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF0 10508 bytes

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