Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf5b8bd98f0dbff…

MALICIOUS

PDF

41.8 KB Created: 2020-08-10 05:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bdb33fec0dc900c0c109e66cc7ab050 SHA-1: 01b942ee41708f19eb649f3a3edaef466e7bef5f SHA-256: bdf5b8bd98f0dbff0fe3182df854d021f81a7841919b8d3ccee2a716033fdb1a
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc'. This indicates a link farm or redirection scheme designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL, suggesting a lure to download or view a PDF, which then redirects to a malicious site.

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=audience+analysis+denis+mcquail+pdf
    • http://files.countrysiderefind.com/uploads/1/3/2/7/132740462/7704eaaac69.pdf
    • http://files.nileshsp.com/uploads/1/3/1/8/131871625/07cf401a3ea82b.pdf
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/picsart_photo_studio.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/new_headway_beginner_student_s_book_fourth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3104/files/kizatevelewolulurolaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/juvigavurovaroxopuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/91428071195.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1121/files/refilut.pdf
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/lapowipezarid.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/68651223834.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/lurozozimisurekatomebo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/7942478047.pdf
    • https://cdn.shopify.com/s/files/1/0438/4584/5152/files/73452310531.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_off00006366.bin
3c7bdf62cd0754539d0e482103311e957066b8197b0c240902ded1e22fcee5d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 5424 bytes
font_01_sfnt_off000075d8.bin
689f8d9fef7a832586ff43f901464df15de77b0354187867b0bd7aac6195984d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D8 10692 bytes

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