Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ff335f75bf2059…

MALICIOUS

PDF

40.6 KB Created: 2020-08-26 04:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89c667aa4607e2f097199b5bf8231d29 SHA-1: 2b2115f5da070aaf060de728c0b1757dcee60f12 SHA-256: f4ff335f75bf2059016f9823568c5646ee8f27b580f33c4cb0710f0f91d888e9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the text 'Ielts essay on crime and punishment' and the malicious redirector URL, suggesting a lure to a phishing or malware distribution site. The presence of a PDF link farm heuristic further supports the attack pattern of directing users to external resources.

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.link/pify?keyword=ielts+essay+on+crime+and+punishment
    • http://nivujoko.gettruckedoz.com.au/uploads/1/3/1/3/131384169/c7762495217c0.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/coats_tire_machine_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/caballo_de_troya_6_jj_benitez_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/binomial_pairs.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/dirty_text_messages.pdf
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/jupovaxofufapet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/52594877368.pdf
    • https://cdn.shopify.com/s/files/1/0432/1968/1437/files/towudatagemiwor.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/vexodarakubas.pdf
    • https://cdn.shopify.com/s/files/1/0436/2040/1316/files/asterix_and_obelix_olympic_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/mee6_purge_command.pdf
    • https://cdn.shopify.com/s/files/1/0429/0845/0972/files/kodusivepidij.pdf
    • https://cdn.shopify.com/s/files/1/0432/5703/6968/files/sky_go_formel_1_on_demand.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6184/files/australian_address_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/48451810579.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_off0000611f.bin
9ae972bed08ee56e352da5faab9d8bf0952d9578caa6ac13321dc7b62ad4823b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 5352 bytes
font_01_sfnt_off00007326.bin
8c8f26cc03e5fdfc5b59846c0d42ab0caafd859fe587cd38156f093c041796a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7326 10100 bytes

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