Malicious PDF — malware analysis report

Static analysis result for SHA-256 900fa21c9ee2a1e7…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 14:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ff9f09339999dc913194bc41df598e9 SHA-1: 0ee3e5bf0942410b234a7307b80bb2540351082e SHA-256: 900fa21c9ee2a1e7ff386ac7900d256e3d17871351c1766b19d4b766c41a04dd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms or redirectors. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=ribbon+in+the+sky+chords+pdf'. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a tactic to drive traffic to potentially malicious or deceptive content. No scripts were extracted, limiting the analysis of direct payload execution.

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=ribbon+in+the+sky+chords+pdf
    • http://ditopilak.rubyscardsandgames.com/uploads/1/3/0/7/130739625/nemelofade.pdf
    • http://files.blazproject.org/uploads/1/3/1/4/131452997/6462421.pdf
    • http://files.mccarranferguson.com/uploads/1/3/1/4/131437418/badetilalikison.pdf
    • http://files.madameburnett.com/uploads/1/3/0/8/130813301/b527644a8971.pdf
    • https://cdn.shopify.com/s/files/1/0436/8013/7369/files/4311510705.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/81470691560.pdf
    • https://cdn.shopify.com/s/files/1/0450/3502/8630/files/public_policy_analysis_noun.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/67158147532.pdf
    • https://cdn.shopify.com/s/files/1/0434/4971/2807/files/booklet_maker_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/dell_r840_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/medidojupi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/vakarokodejakofudimize.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/git_revert_commit.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/6545442894.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/52601788181.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_off00005655.bin
4c02f215a3c6e79331128a7dff5816bdc25ac2d6decfe5bde56f0443d071e250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5655 5316 bytes
font_01_sfnt_off0000686f.bin
5ce3d46b5a456ec10a10a55a2826f5fae6d8e72f02427445f0cd95ae9fdb5682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686F 15268 bytes

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