Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9bfaeffa566848d…

MALICIOUS

PDF

47.5 KB Created: 2020-09-17 17:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02760f566c5deef1d400d7d35f9761f7 SHA-1: c7363dcc085df30eb117e973bb15b51a61d11927 SHA-256: f9bfaeffa566848dd094dcbdae85815d2a5fd76a704e1e64ee86422ab4cc9f0a
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also assigned a high probability of maliciousness. The document body contains numerous embedded URLs, including a primary malicious redirector at 'https://ttraff.ru/wix?keyword=los+continentes+del+mundo+pdf', which is likely used to funnel users to malicious content. The presence of a mass external PDF link farm suggests an attempt to manipulate search engine results or distribute malware through a large number of seemingly benign but controlled links.

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.ru/wix?keyword=los+continentes+del+mundo+pdf
    • http://files.davisonavenuepta.com/uploads/1/3/1/4/131438658/6790862.pdf
    • http://numokin.hartshillandharpfieldsra.org/uploads/1/3/0/8/130873784/2335432.pdf
    • http://files.97silverspring.com/uploads/1/3/2/6/132695301/wigiwarenar.pdf
    • http://mokujuzav.pleasantvalleyciderapples.com/uploads/1/3/1/3/131398425/vifijamejinagik.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/dobatexapoze.pdf
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/tv_guide_cincinnati.pdf
    • https://cdn.shopify.com/s/files/1/0464/9261/4824/files/lagu_ava_max_anyone_but_you.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/sinonimo_di_aggiornare_informazioni.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/zosyn_davis_drug_guide.pdf
    • https://b06a0a25-3d5b-4848-bcde-75612cb6c063.filesusr.com/ugd/ee9d3f_a75b61ed0a9d4d0fb53ef44c015da2aa.pdf?index=true
    • https://fe8e3687-d9ca-4c3d-97d6-e0df88b995a9.filesusr.com/ugd/bd1fc0_757b60e1476242ffa5ba25244ab3c93a.pdf?index=true
    • https://636d9f2a-0eab-4b5b-a2b2-b099f1b40c4a.filesusr.com/ugd/7c1f05_9b7748c30acd43f6b12cae4e35788225.pdf?index=true
    • https://81d5ad6e-aba7-4daf-a262-28666cae6896.filesusr.com/ugd/0b1cf2_7e0f5f555e734f2aa7310a78595f4f6c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/9681/6282/files/lens_mounts_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/59956102231.pdf
    • https://cdn.shopify.com/s/files/1/0457/7152/2214/files/dotivewujotabifujefizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/vobajokufuzekivimeso.pdf
    • https://cdn.shopify.com/s/files/1/0486/0234/9733/files/esma_final_guidelines_target_market.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_off00007af7.bin
3d58489cc65d84daf9be7ac22d2ac29366c7c3a66cccff2705ac46b178572930		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF7 4936 bytes
font_01_sfnt_off00008bba.bin
2a9bea0fa8d5fc7a2bad908a04a02e9d9b9882bbd8ca88eac1d3c662efa67cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBA 10944 bytes

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