Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b85af688523288…

MALICIOUS

PDF

44.0 KB Created: 2020-08-10 07:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9610c29fbeb427e1582fd9cf70e52572 SHA-1: f8df678e99286161d58d10ce27730b4eb6ad3f2c SHA-256: a4b85af688523288bb8e5c274ae936d565befe794b7628377bb7999031c0eb94
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains text related to a 'diagnostic test for malaria pdf', suggesting a social engineering lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

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=diagnostic+test+for+malaria+pdf
    • http://files.wellness.org.sg/uploads/1/3/1/4/131437249/7598015.pdf
    • http://files.nevergoaday.com/uploads/1/3/1/0/131070523/ruzirevegog.pdf
    • http://moruwulab.rgvjrs.org/uploads/1/3/0/7/130739777/7459120.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/kevodasetijivukirudaritap.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/brain_teasers_esl.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/76732021691.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/zosirikuwijepokitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5586/5242/files/sefiroziketomonuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/algorithms_and_data_structures_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/xuxojesodibuwaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/23134376463.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/piweluxobaxaluzelipevebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/37400624384.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/chemistry_hsc_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/52195965190.pdf
    • https://medlineplus.gov/lab-tests/malaria-tests/
    • 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/
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/piweluxobaxaluzelipeveb

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf5.bin
18f9657ac043082405cc1d67e65a0738dd8ab85a887a2061eb567a885ef437f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 5476 bytes
font_01_sfnt_off00007f8a.bin
755420640a0cacb5411d92eae5cb4ad76be04f2d76369bcaa7b4a8c5092a24cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8A 10408 bytes