Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc68c114610681c7…

MALICIOUS

PDF

37.3 KB Created: 2020-08-24 01:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7a143328980c9c852fc5015032bbc8 SHA-1: e14cfc7c8e0b84574dbc86c60c24eb94d55c6494 SHA-256: dc68c114610681c789a2911d9f56d33754a52bcd3b12b9cb20ef4ccccadc774f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=dermatology+network+solutions+provider+manual'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF filenames, suggesting a lure to a malicious site disguised as a document. No scripts were extracted from this sample.

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=dermatology+network+solutions+provider+manual
    • http://files.lexingtonal-anon.org/uploads/1/3/0/8/130874398/lutor_kapetekugow.pdf
    • http://garomid.monasfamilyemporium.com/uploads/1/3/0/7/130739678/doworenoxeletoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/rainfed_agriculture_agrimoon.pdf
    • https://cdn.shopify.com/s/files/1/0437/1759/1189/files/template_letter_for_gifting_money_uk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/45267260369.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/unisa_online_application_form_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/68863040581.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/logademosizojuvomevujovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/arabic_to_english_word_converter_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/8304/6813/files/fanolijosuzovaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2517/files/predicting_before_reading_worksheet.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_off00005118.bin
d5c917b97069d1e9327e9b4eae5887ffe0178249271b427d574375b05010bd20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5118 5596 bytes
font_01_sfnt_off0000642f.bin
a4340a01d918f34e2655bf6cfdca5068893704d035f3195817f061da90f7feac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 10748 bytes

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