Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41bda85905065b1…

MALICIOUS

PDF

66.4 KB Created: 2020-07-31 07:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86c12cbd05b5e24364f00a86f04e1b5f SHA-1: 09bdee141e71515769aa51eab8897adfc1b762d1 SHA-256: d41bda85905065b18463a2fd1b37e6bb46ed47bac0a766e5361ea794dd6056bb
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 external PDF files hosted on Shopify. One critical heuristic indicates that the PDF links to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Centroids of plane areas pdf', likely a lure to make the document appear legitimate. The primary malicious IOC is the redirector URL.

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=centroids+of+plane+areas+pdf
    • http://files.lauracrosskey.com/uploads/1/3/2/6/132696030/sosatosavo_bunoximur_guvesitexabe_bifujipovo.pdf
    • http://files.jaxsinglesgolf.com/uploads/1/3/1/3/131379301/91dd37e6f7d.pdf
    • http://files.wrarodeo.com/uploads/1/3/1/1/131163896/vorax-zojexuxatu-lasej-nomijivo.pdf
    • http://files.lakeodessaarts.com/uploads/1/3/2/6/132680890/joxosaroj-zefedilawuxubo.pdf
    • http://files.thesanctuaryatmn.com/uploads/1/3/1/8/131856184/d83262d07.pdf
    • http://files.lakeodessa
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/wigifisop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/58347772429.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/fugutu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/bebixaweg.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/57959404492.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/tipunaxowadugipuxufefejol.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/degitibemanozagaworapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/30645481940.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/sirekejam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/47315662332.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/fubexesarejil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a2e3.bin
97cbc084a277efa224c5752eee03fde86052a8be73e0ea84c543c90678bfd532
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E3 4844 bytes
font_01_sfnt_off0000b364.bin
00a75efdb675be4876fc13d28e76a1afd13a2bf82fe830aa3d5edbbd1c0616cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xB364 16320 bytes
font_02_sfnt_off0000e648.bin
7deeb3a28e7e7d0830673a67242f829955577b57a7a0c69b01897d491e1536c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 16168 bytes