Malicious PDF — malware analysis report

Static analysis result for SHA-256 5890ab7d59f0e576…

MALICIOUS

PDF

61.7 KB Created: 2020-08-27 22:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e7604480f4879e6e838e974cf110c25 SHA-1: 6633d5cc4f4f8a013092c47cbe2e1d609bee75af SHA-256: 5890ab7d59f0e5763a5422f10aead2cae0d423b51973ae4d68bce902a5b3a14c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=laplaciano+en+polares'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file also exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on cdn.shopify.com, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, and the file type is PDF, indicating a social engineering-based attack.

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=laplaciano+en+polares
    • http://lebibejo.southwestvintagecycle.com/uploads/1/3/2/6/132682883/6bdcd1c.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/45886577216.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/behavioural_finance_and_wealth_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/7441/1926/files/jufulatogimogarenosebib.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/migoxanegetotar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72274594547.pdf
    • https://cdn.shopify.com/s/files/1/0466/4986/8453/files/a_shade_of_blood_epub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1534434062.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/10994228988.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/maruk.pdf
    • https://cdn.shopify.com/s/files/1/0437/4511/6311/files/52789116078.pdf
    • https://cdn.shopify.com/s/files/1/0466/7411/6773/files/labeling_earth_s_layers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/excel_advanced_skills_writing_workbook_year_4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008901.bin
3e9b575aa835c270e36f5097e1926f4c0d9a692e1935482f1273459da93b4c54
pdf-font-stream PDF embedded font (sfnt) at offset 0x8901 4868 bytes
font_01_sfnt_off0000998d.bin
230c51898203565cc0e16083e617578b014a252d09ed77176fda93b192fc4deb
pdf-font-stream PDF embedded font (sfnt) at offset 0x998D 1604 bytes
font_02_sfnt_off0000a1c3.bin
6e089d585a8ff826ffd487993bec7c8e7e2dff67b71334e82a7691a735e37ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C3 15100 bytes
font_03_sfnt_off0000d0e6.bin
5f8e722963eacd698abce60c8cde2a397bc2cb1b4f20afa07a18f7d3242a9c69
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E6 16484 bytes