Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfcfc4d18abb6b3…

MALICIOUS

PDF

47.5 KB Created: 2020-08-23 12:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62f932014b4449fd834e8199cd03a206 SHA-1: 4fbab5a2290624bf8fc355fb90bbcbb692cd0664 SHA-256: ecfcfc4d18abb6b3b40888e0a3eb356d8d7ba14d609b0a9ffcce20be355faf56
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a phishing or scam attempt where the user is enticed to click a link under the guise of downloading a PDF, leading them to malicious infrastructure. The document body itself is heavily obfuscated and contains the malicious 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.ru/pify?keyword=neurological+assessment+nursing+procedure+pdf
    • http://files.godtalkunfiltered.com/uploads/1/3/0/8/130874018/xejusipexinotatavi.pdf
    • http://woruw.media-education-portal.com/uploads/1/3/2/7/132740873/luroneru_xerurak.pdf
    • http://fipom.darksideofthetrail.com/uploads/1/3/1/0/131070476/f1a0e48fafb2a.pdf
    • http://baxodapa.soulbodyexperience.com/uploads/1/3/1/4/131437252/2496575.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/14598140480.pdf
    • https://cdn.shopify.com/s/files/1/0461/4026/0505/files/hospital_management_system_project_in_php_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/93468580233.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/99580872600.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/13650528759.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/antenna_wifi_usb_per_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/79044631005.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/76180164317.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_off00007a06.bin
cbb325d0ca909a972c827eba1bb42fcc68ba35cf9f5b0ca246f5f0b0868e9089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 5444 bytes
font_01_sfnt_off00008c81.bin
6095fbe280cfba4cedc0d32cbe27160bc19bbcaf8f13a921d5e07ba2328664bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C81 11132 bytes

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