Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58d21e2881b357a…

MALICIOUS

PDF

44.4 KB Created: 2020-09-02 13:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41474dccdf70687c46383307fb9c4b9e SHA-1: 6491e450740eb6ada552fa6e669b0d93067d2c6d SHA-256: e58d21e2881b357aa1c7db185ba1b9a2833a8f7438508cda313283aa0822e60f
168 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is presented within the document body, alongside numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' lure and a 'password archive' lure indicates the document is designed to trick the user into downloading and potentially decrypting a malicious payload. The primary malicious IOC is the redirector URL.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=naruto+shippuden+senki+beta+apk+free
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/93536887111.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/ample_information_en_francais.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/analogy_test_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/rezumubupojasogezarizuged.pdf
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/jolomogujixikegotun.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/75356886948.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/kevedixoroxisadojizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/hemoglobinuria_paroxistica_nocturna_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/80688554258.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/lagu_aishiteru_banzai_nishikino_maki.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdc939491d92479f8f9e78a9789a4662.pdf
    • https://static.usrfiles.com/ugd/39cb9d_ce428506b37c4d08badcb86847dea1bf.pdf
    • https://static.usrfiles.com/ugd/3f0e57_e70b7b3983684e1bac92e7d4f7f844ee.pdf
    • https://static.usrfiles.com/ugd/16a96a_c81c89f7431b4bb88f09e14dc8cb662c.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_off00006af5.bin
4480aa5b9dcaf7d28cd55661a20d2ff848c570dc8eb3f56d62c9b71771c791c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 5268 bytes
font_01_sfnt_off00007cd9.bin
218f79c83314311d0bdfa76beb3df922170147f70e7d3e482c326a52e23bc5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD9 12664 bytes