Malicious PDF — malware analysis report

Static analysis result for SHA-256 55cb6f885acef02d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-18 22:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42b9905136a0b5591e758e0cde990853 SHA-1: 24fbd681df8aecb5158e84a51fcacc40684e1c88 SHA-256: 55cb6f885acef02d6c21f326cb3be74867deccb65bf8a7e035fc7dd0818b84ee
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and references to 'best english music albums free', likely a lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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.com/pify?keyword=best+english+music+albums+free
    • http://files.theteamvision.net/uploads/1/3/1/6/131637814/3694776.pdf
    • http://files.lsccmn.org/uploads/1/3/1/8/131871849/5680994.pdf
    • http://vorobap.greatlakesgreatstories.org/uploads/1/3/2/6/132682883/9750394.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/xixeraxunutazirorijive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/1995_buick_century_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zokiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/biwetabosipetalolu.pdf
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/celtic_alleluia_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/wobosigodevuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tukesameb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/rubmaps_login_passwords.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_off00006c1e.bin
82b657236046c73525640d68e027e9eb4a47bcdc90efae7df8178d7a0f9a3e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 5484 bytes
font_01_sfnt_off00007e92.bin
caf76a94fdf223dd750504cd7f931b7e37a2f36b679fd3d7cbe5dba537c00991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E92 10240 bytes

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