Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41bd3251985873e…

MALICIOUS

PDF

56.0 KB Created: 2020-08-30 16:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ccd67886c6fc51d8d84c71b5e27879b SHA-1: 9f940b75d7f9fee763e3bf10a0d10bac65677da1 SHA-256: c41bd3251985873e6f02608bb6499090c024f03c7dcd1ca59e6dd418574d55e8
128 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, pointing to 'https://ttraff.ru/wix?keyword=ipod+touch+4th+gen+ios+6.1+6+firmwar'. This indicates the document is designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains the same URL and text related to an 'Ipod touch 4th gen', suggesting a lure to entice clicks. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports a malicious workflow involving user interaction.

Heuristics 4

  • 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.
  • 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=ipod+touch+4th+gen+ios+6.1+6+firmwar
    • https://static.usrfiles.com/ugd/b8c837_1d9d6dc979fe4e8493946f2e5b0cc57e.pdf
    • https://static.usrfiles.com/ugd/26938b_1e9bb1d1c9d1433299a1a5ee383245dc.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_998baa2602ce4e17b89e36129a3b20f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_685c5de96c4c4fb7b9e312da8da0a627.pdf
    • https://cdn.shopify.com/s/files/1/0431/7711/5812/files/data_analysis_introduction_to_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/65092084714.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/diabetes_insipidus_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/kuxoworisomanazixeto.pdf
    • https://cdn.shopify.com/s/files/1/0463/2618/6141/files/bad_boy_maverick_mower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3560/5664/files/71529617707.pdf
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/cookout_restaurant_nutrition_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/5991735640.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_off00007942.bin
7a10181b794d22375e64de97b8338a2a14b59ac709fa9d54e3eca8148d501af0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7942 5892 bytes
font_01_sfnt_off00008d46.bin
06607ccd082d0fccf98d8ff67bea6e7b9cd40a4a522831c530260c5ef35eb7bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D46 16560 bytes
font_02_sfnt_off0000ba50.bin
daa224302820a24ffe93b0d0c5ae003807338a09c76c26e4d07262265e46b8f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA50 16984 bytes