Malicious PDF — malware analysis report

Static analysis result for SHA-256 2641353e8e618319…

MALICIOUS

PDF

48.2 KB Created: 2020-08-23 22:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a047c10b5b1d229434481c5a2a5798d4 SHA-1: 2752455ae675a3981fae969feaf8076ad0d22bb6 SHA-256: 2641353e8e618319415063191b18cd5eb6bb6ef8103fc72c099047c0f8944916
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a PDF link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=cardinalidade+base+de+dados+pdf'. Another critical heuristic indicated a PDF link farm with 30 external PDF links, many pointing to Shopify domains, suggesting an attempt to obscure the true malicious destination. The document body contains garbled text but includes the malicious redirector URL.

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=cardinalidade+base+de+dados+pdf
    • http://xufevi.kdchipi.org/uploads/1/3/1/1/131163599/jogibo.pdf
    • http://files.barkerschristmastreefarm.com/uploads/1/3/1/3/131379443/vasuzabusoto_dobaxina_xexalekuwuje.pdf
    • http://files.longsightnursery.co.uk/uploads/1/3/1/3/131379545/56f332280d5.pdf
    • http://files.columbiadentcenter.com/uploads/1/3/0/9/130969910/jubegonakajij-desagomabof-sateno-pikilolot.pdf
    • http://zazoka.aacnationals2016.com/uploads/1/3/1/6/131636813/d94c65c.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/83268176463.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7804/files/evocative_objects.pdf
    • https://cdn.shopify.com/s/files/1/0435/2045/8906/files/65864920795.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/numekuxogamefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/jusedawasanusukibujabip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/10425416259.pdf
    • https://cdn.shopify.com/s/files/1/0457/7922/2694/files/nadra_b_form_registration_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/bomezolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6773/files/wavogewojexovutafogoviw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/lagubajexulezuwapudobix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/sexavubisif.pdf
    • https://cdn.shopify.com/s/files/1/0435/7524/7003/files/rukemefawaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/0980/8283/files/blood_type_a_recipes.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_off00007a9a.bin
966265b16c8055337269aa6ed1eaf41be7af439f946ec108ea3721e24b39b5f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 5080 bytes
font_01_sfnt_off00008be1.bin
cb993da42a32cf197abf14593595d08279647b31f1332be37c23cab20028044c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE1 12792 bytes