Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5becaf1ebeb158c…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 16:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6ad97cec99eda07373612de44f52f8 SHA-1: f4aace42d84b0dbcd0aa53c41ae2df8e40d58f06 SHA-256: a5becaf1ebeb158c7c0cb41790b105f9fa1586d85c83797c5a907837a91241a7
120 Risk Score

Malware Insights

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

The PDF file contains a link disguised as sheet music, which redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or SEO abuse tactic. 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=yann+tiersen+amelie+piano+sheet+music
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/forever_judy_blume_movie.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/arthritis_research_back_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/60676556744.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/acumed_distal_radius.pdf
    • https://cdn.shopify.com/s/files/1/0441/1362/5240/files/98728978436.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/poetry_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/oxford_discover_4_workbook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/mupofeburimabugelirujuken.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/webisa.pdf
    • https://static.usrfiles.com/ugd/430cb2_451a6d06048c45eca616935453aafd99.pdf
    • https://static.usrfiles.com/ugd/3aca14_f917959dec7b4582b7291b56dd37a975.pdf
    • https://static.usrfiles.com/ugd/b8c837_ead31749629042c5bea6a0dfa8203bb5.pdf
    • https://static.usrfiles.com/ugd/834936_44e607999b0a45c49bd16bce31843099.pdf
    • https://cdn.shopify.com/s/files/1/0429/5245/8396/files/abelia_planting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/9980055884.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/symbiote_spider-_man.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0407/files/wenaxos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/macbook_pro_2015_release_date.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_off00005e8b.bin
562ac59334cad68454d321e37c6751fcd0d9da3351aa6808c147282bc256915f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8B 5136 bytes
font_01_sfnt_off00006fcd.bin
d5d3db891a2712b11dad7a552e608521a98c13b2f9615dc92c0a907bc872927b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 15796 bytes