Malicious PDF — malware analysis report

Static analysis result for SHA-256 e336872997adfa1c…

MALICIOUS

PDF

44.6 KB Created: 2020-08-10 07:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 764577e74dc4bf53e89bfcf5c099bdd7 SHA-1: 568b5d32e197a6a90311815b11f96acb24013a53 SHA-256: e336872997adfa1c28bf2bc6a0e616a033b53b02aa3c674d33b4bff7154423f0
120 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.cc/pify?keyword=calcium+phosphorus+metabolism+pdf'. This indicates an attempt to lure the user to a malicious site. The document also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The embedded document body text, though heavily corrupted, contains the same malicious URL and a reference to a scientific topic, likely a lure.

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.cc/pify?keyword=calcium+phosphorus+metabolism+pdf
    • http://files.trevorbalthrop.com/uploads/1/3/1/6/131637224/5ce20027f3e.pdf
    • http://files.sicilyreview.com/uploads/1/3/1/4/131406344/nadajemuk.pdf
    • http://files.pleasantunionfarm.com/uploads/1/3/0/7/130776641/1143929.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/makalah_tentang_bblr.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/96559379139.pdf
    • https://cdn.shopify.com/s/files/1/0438/1235/6253/files/buponeduwutijof.pdf
    • https://cdn.shopify.com/s/files/1/0439/6112/2974/files/bsc_agri_merit_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0441/3433/4616/files/ishihara_color_blindness_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/36999706177.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/dakaxowobapusek.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/87530144481.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/ninuxanaxewi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1197/9939/files/canara_bank_gold_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/fatazitomix.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_off000066d7.bin
cf60f06a658d2379890a75195adc7fe80efc2d894644012b7643c9969d189d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D7 5440 bytes
font_01_sfnt_off0000791a.bin
574fc4933fee94247eeb8a5383af8b6461b183418c0a30ba676474289e8b8e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791A 14204 bytes

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