Malicious PDF — malware analysis report

Static analysis result for SHA-256 20395f6223c11e60…

MALICIOUS

PDF

46.3 KB Created: 2020-09-01 01:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b353806076a4ae292c4ed7483f3348e SHA-1: c5f9e39e16de927b71c83d9664594a3a2be223d1 SHA-256: 20395f6223c11e600a7c0e0842dfa76fe7dec2adc716fc2cfd8f8008a9a8ce43
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=birthday+photo+cake+app'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to redirect users to malicious content or phishing pages.

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/wix?keyword=birthday+photo+cake+app
    • https://static.usrfiles.com/ugd/18f527_275765992f7e479094ce7cebce9049a7.pdf
    • https://static.usrfiles.com/ugd/83d902_1c693a270b314722bbd98e362bf78374.pdf
    • https://static.usrfiles.com/ugd/b8c837_85610b545a39410487a610b3e7dfc8c2.pdf
    • https://static.usrfiles.com/ugd/73cb9e_8566f98ce1b94620a993164ec2e15673.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/5446734381.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/xadadojopinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/4999/files/baixar_creator.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/rapixob.pdf
    • https://cdn.shopify.com/s/files/1/0464/5493/1624/files/mezajamarojibivimotiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/yubikey_windows_login_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8412/files/iso_31000.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/ccleaner_free_cnet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/wurolobog.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/mango_capsa_susun_new_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/como_convertir_un_archivo_cade_simu_a.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_off00006704.bin
dd46307016a4dc7ea424ec3f886e4a647e7e1f97b79880b65cf423cb4c106751
pdf-font-stream PDF embedded font (sfnt) at offset 0x6704 4620 bytes
font_01_sfnt_off00007736.bin
b4fac70b176f4359b2673a5e81c617f712dafd572fd1cd33fba3a3aa557885b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7736 5168 bytes
font_02_sfnt_off000088cc.bin
605a7123dc8c76edefbd4e4b5c371b84a5c6e7585a9cf7a0af78f3a059700539
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CC 9740 bytes