Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd589c02e30ec64f…

MALICIOUS

PDF

83.5 KB Created: 2020-08-06 09:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01733bf44ba1ac733d8cb994ddc81b36 SHA-1: a3e5200ccc0a3bd8712722eaeb69972e83a68818 SHA-256: dd589c02e30ec64f7c3d83e26bb7cb611faf99a96611aab949dd0584bf10fdd8
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL (https://ttraff.ru/pify?keyword=the+astonishing+color+of+after+pdf+free+download). Another critical heuristic indicates a PDF link farm, suggesting SEO manipulation to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict. The document body, though heavily obfuscated, contains the malicious URL and references to PDF downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=the+astonishing+color+of+after+pdf+free+download
    • http://files.wyntrcardigans.com/uploads/1/3/2/3/132302910/sujedudomeku.pdf
    • http://files.dalmatiner-von-kalina.com/uploads/1/3/1/4/131406248/431f90ce.pdf
    • http://files.spiritcreekfarm.com/uploads/1/3/1/3/131384436/9062587.pdf
    • http://files.millvalleychickens.com/uploads/1/3/0/7/130739340/5180252.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/belanamedonelijukojirexar.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/75199348626.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/53046997691.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0151/files/one_thing_kevin_gates_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/xuludexenilowufepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/farew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bukidesokat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/gowibijajopoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/us_states_json.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.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_off0001092c.bin
fb4fd8827f7fd984196f0c997f83dd31c69e16e50c2899d9aad600e73e894f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 5456 bytes
font_01_sfnt_off00011bc7.bin
d4a6e0f1f5e8a1b983fc97adfb03ad443dc186dae4591a346e7770c73d475644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC7 10800 bytes

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