Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b07cd3b5bb465c…

MALICIOUS

PDF

45.5 KB Created: 2020-08-07 19:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce103fdcba0e3bdf49a06c725b2d1b3 SHA-1: ddaeb7e082da51db33f1e51771b9e0dc0d21a14e SHA-256: f6b07cd3b5bb465cc6c3b31aa49bab32bb0eefddafbe2d83566daf139b85125c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to `ttraff.ru`, which is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to 'SBI personal loan form' and the `wkhtmltopdf` application, suggesting a lure to trick users into downloading a file. The presence of a visual download button further supports this phishing attempt. The primary attack vector appears to be a link-based social engineering lure leading to malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sbi+personal+loan+form+pdf+download
    • http://files.cyhmnslam.com/uploads/1/3/0/8/130874067/viwijire-takovedov-nujapum-satuxekituzesi.pdf
    • http://files.anintimateplace.com/uploads/1/3/1/4/131437312/1098fa83f440c5e.pdf
    • http://files.bainbridgeje.com/uploads/1/3/0/7/130738569/tisisofavilufudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/gebelisuruwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7454/files/7388670869.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/56525057261.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32867625585.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/panilawaximapuxizaxol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/1186064823.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8545/files/goxogixadepofaguruwuwafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/70050843380.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/mevemigirogasijazegenosuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/fevatuputigagagagepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/bebatikoreboboxuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/37829435617.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_off0000746b.bin
1d73ba10c0425f2a8cd8b0442db244b7cb74a70ec0070b2b8e21d4bbb4fc2621
pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 5524 bytes
font_01_sfnt_off0000872a.bin
d091f2bb62702e9c87c8a2c2eb2df900418b929dc458311ca0358818f32e6c93
pdf-font-stream PDF embedded font (sfnt) at offset 0x872A 10044 bytes