Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5af4ce7c38d474…

MALICIOUS

PDF

43.0 KB Created: 2020-08-21 17:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a288168d7e5a57d5b1112adef9dc0f SHA-1: 950cc91e14273b886b1423ff41b7efc436c3e357 SHA-256: bd5af4ce7c38d474e2e11cc6d41308c813d5a1cfb14db9038f758e7043fab9c2
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, a technique often used to obscure malicious destinations. One of these links, 'https://ttraff.com/pify?keyword=angular+formcontrol+remove+focus', is identified as a malicious redirector. The document body itself is heavily obfuscated but contains this URL, suggesting the primary purpose is to lure the user to malicious infrastructure. The presence of numerous other links, many pointing to Shopify, indicates a potential link farm or SEO poisoning attempt to distribute the malicious content.

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=angular+formcontrol+remove+focus
    • http://files.wildflowercentury.org/uploads/1/3/1/3/131381539/jebipuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/write_20_full_form_of_computer.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/mudinum.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/authorized_king_james_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/repirimusikumulizaja.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/barium_swallow_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/further_mathematics_textbook_for_senior_secondary_school_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/ruxariwirowajenoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/gst_annual_return_extension_notification.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/ruvewafizizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/understanding_psychology_robert_feldman_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/54530005088.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/5th_grade_math_place_value_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/tamil_bible_audio_app.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_off00005bdb.bin
0bf56bc344911e9fb7a31bbf7c911f6d336ad743bc71b777cd860a2947934930		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDB 5248 bytes
font_01_sfnt_off00006da7.bin
0593d329d5ac7e184a65773429e4633d5119a4fd60669230206ddb2bb8060760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 15956 bytes

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