Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf962285f8917e8…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 22:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 004d34c0efa70e764bf193db4cd81db6 SHA-1: 5277ab3c2a8d4a71e0ac2454ec1309e9b31a275f SHA-256: faf962285f8917e871762e5d42351014ba9c2132e75fa8c8fdcb8beb5b88ae02
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate that the PDF is designed as a link farm, likely to distribute malicious content or facilitate phishing. The primary malicious URL identified is https://ttraff.ru/pify?keyword=aprender+frances+pdf+completo, which is used in conjunction with other benign-looking Shopify links to mask the malicious intent. 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.ru/pify?keyword=aprender+frances+pdf+completo
    • http://pepitu.frauhoeckner.com/uploads/1/3/1/4/131453215/eb6507.pdf
    • http://files.giuseppemanzillo.com/uploads/1/3/1/6/131606652/mizumuji-duturivuri-jikep.pdf
    • http://files.msdewarsclass.com/uploads/1/3/0/8/130814032/jopudaj.pdf
    • http://files.christianchurchinpennsylvania.com/uploads/1/3/1/3/131381722/dosetokebilagor_bopudexapox_kebafasot_bizitalijel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/mivukebikofe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7808/0925/files/john_deere_gator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/1091/4466/files/birla_sun_life_sip_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/19575796080.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/antimoniales_pentavalentes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/international_accounting_standards_14.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/51495308140.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/dijudofo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/pensum_de_administracion_de_empresas_uasd.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/league_of_graphs.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0306/files/4629547116.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/gakibisotokigitamasaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/56871191172.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_off00006508.bin
a3a9c92f0da73ded39a20cee2d232ef72ae7ee91aa3f069c883a9545c55fb6bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6508 5288 bytes
font_01_sfnt_off000076ef.bin
b2825e5bcfafef199d6e11008df268372dcab8d46cc4d17e849013b2fab39ba4
pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 10564 bytes