Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3624d9552eaf73…

MALICIOUS

PDF

40.3 KB Created: 2020-08-12 01:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9882b7aa0808040ebf5027bd3b1d793b SHA-1: 6185827d40d90c803cc193bc11602afc707b0a1d SHA-256: 8e3624d9552eaf73503814fb0c1106f9a2c45cc7ac6b34c94e81513299c07865
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, indicating a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=ceramic+capacitor+code+chart+pdf', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=ceramic+capacitor+code+chart+pdf
    • http://files.monicalrosen.com/uploads/1/3/2/7/132710632/fidozugefaz_rowuferovitofe_balekepisutaj_wamosugesowi.pdf
    • http://files.njjba.com/uploads/1/3/2/7/132712545/9be1bd198d56.pdf
    • http://files.dancerciseuk.com/uploads/1/3/1/4/131406258/xuremakerul.pdf
    • http://files.genesiseventsinc.com/uploads/1/3/0/9/130969469/8579880.pdf
    • http://files.pontyclunchiropractor.co.uk/uploads/1/3/0/7/130738752/b51169b1b530.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/31688804190.pdf
    • https://cdn.shopify.com/s/files/1/0440/6460/4310/files/74925394020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/jedazigezemevolozorames.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/rizedabixasovomekimuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/660701055.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/69176108763.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/tratamento_da_ascaridase.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6337/files/zidorur.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/mezifakamazeviruxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/mamiresogotuzomedodave.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/leduxanopedadarero.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/34029492092.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/67860642659.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_off00005fe3.bin
e9c3557197aa3c58d2b907dc59939e589915f267751b4ed7cde5b20a307b4ce8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE3 5088 bytes
font_01_sfnt_off00007108.bin
03699cc84ed3dc8479ac1687a5dec995c37203de6cdfc5a64029349d596bd893
pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 10916 bytes