Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5dc31a316101153…

MALICIOUS

PDF

69.0 KB Created: 2020-08-30 10:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b91a38b11a28ec97bbabb3b1441df1a SHA-1: aedd27ce0fa5b8133905bb4f2a5a8ec906f5e241 SHA-256: b5dc31a3161011530b21154e28f8b570f9ac2c063bcc7e755c7e4e519439f8a1
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=bugs+bunny+road+runner+movie+youtube', is flagged as a known malicious redirector. The document body appears to be heavily obfuscated, but the presence of this malicious URL and the link farm heuristic strongly suggest a malicious intent, likely to lure users to a compromised or malicious site. 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=bugs+bunny+road+runner+movie+youtube
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/barcharts_quick_study.pdf
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/suzubetedon.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/sibuwepakalevujesom.pdf
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/la_vie_en_rose_piano_sheet_music_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6bac8e5f8da4609a8e6fa286ba4fc92.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8a5c00ffe6a4e989d73a36d8f216866.pdf
    • https://static.usrfiles.com/ugd/74c34a_888fef407e964613878b2ad45b0fac88.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/wing_chun_compendium.pdf
    • https://cdn.shopify.com/s/files/1/0462/4180/8535/files/73511542121.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/rijuxonisarujowasive.pdf
    • https://cdn.shopify.com/s/files/1/0436/3229/6089/files/3rd_grade_go_math_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0443/8809/0022/files/buffalo_dairy_farm_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/lamavivesegibasupuragew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/being_a_better_woman.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_off0000c2b5.bin
7339c1d7855373717221634a81223c1766fd37d9480d42e843c3c8a9c0f100a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B5 5348 bytes
font_01_sfnt_off0000d4ca.bin
20466919bc8110e61f1d6637984a2d448293541420a0736d5fa90bcd848f3773
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CA 10612 bytes
font_02_sfnt_off0000f8a9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 4324 bytes