Malicious PDF — malware analysis report

Static analysis result for SHA-256 e651e8fc3c4f1ee7…

MALICIOUS

PDF

53.3 KB Created: 2020-08-25 23:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ed7cc5e3549fc3512e54b951beb32d0 SHA-1: a4abcc522665f04304edf3c4040ebd37dcbbcc02 SHA-256: e651e8fc3c4f1ee7efb747f04bab9236e9e0cf9a088e74c7060f53c3df1a793c
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs, but one critical link redirects to a known malicious domain. The document body text, though heavily obfuscated, contains the string 'Dark souls damage calculator' and the malicious redirector URL, suggesting a lure to trick users into clicking the link. The presence of numerous PDF links, many of which are likely generated for SEO purposes, indicates a link farm strategy to distribute the malicious redirector.

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.link/pify?keyword=dark+souls+damage+calculator
    • http://mozoxeg.team-change.com/uploads/1/3/1/4/131412290/modegavimurufiruwun.pdf
    • http://files.craftyfoxstudio.com/uploads/1/3/1/4/131437516/mafubojiwowezitewe.pdf
    • http://files.shcdc.net/uploads/1/3/0/7/130776296/7229306.pdf
    • http://files.neperformingartsgroup.org/uploads/1/3/0/7/130739155/d0c158.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/sale_agreement_format_in_tamil_font.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/my_free_annual_credit_report_equifax.pdf
    • https://cdn.shopify.com/s/files/1/0464/9261/4824/files/30248857005.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/watajogudolexetogumolugo.pdf
    • https://cdn.shopify.com/s/files/1/0462/6943/1959/files/wefitusukapuzoluwutu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9351/4645/files/call_of_cthulhu_malleus_monstrorum.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/averroes_search.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/lafukedipaxoxafudejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/36723574102.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/46905622626.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/24196923656.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/negative_creep_bass_tab.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_off00008b39.bin
8527aab2d71878c75e7930d665b1168578d3865df06acbaac863274130c22ea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 5320 bytes
font_01_sfnt_off00009d42.bin
7796d450122c3f5a190a56018d12b3789e6b6aa72ba00bfc52d1044f6f02bfc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D42 13508 bytes