Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc96d68d337bbea…

MALICIOUS

PDF

43.9 KB Created: 2020-08-29 10:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d72df7f53bf30492a42932aa209bb53 SHA-1: f0a291d55ee913e330790c6be4e76e662c26b031 SHA-256: 8dc96d68d337bbeafc89b459af2d419e89748903910e8381b7d34ed67bb3d7af
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated but appears to contain the same URL found in the heuristics. The primary attack pattern involves directing users to malicious infrastructure via these links. No scripts were extracted from this sample.

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/wix?keyword=exercicios+sobre+cristianismo+judais
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/swarm_robotics_a_formal_approach.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/28474887725.pdf
    • https://cdn.shopify.com/s/files/1/0437/9397/3405/files/16404138009.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/8998/files/vapakugabotojupipesalugor.pdf
    • https://cdn.shopify.com/s/files/1/0459/5902/0703/files/ms_sql_database_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/35548457054.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0199/files/jijerakez.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/delta_achievement_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/10483236441.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/69001152614.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0593/files/ccrn_practice_questions_with_rationale.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_off00006a4f.bin
c35c29b013fb666faae645ed65ca2e805da255eac61cce7c013ecd574c448357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 5292 bytes
font_01_sfnt_off00007c2e.bin
a918a0cf0f297eeee16ec08bbaa5988102092ebada867f8f562d93157739a81e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2E 12272 bytes

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