Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef496f41afa5951f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-26 01:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae52bf78b7d1ee9ccf477faf3b6e2330 SHA-1: 642ef9c371edee6afc9398858c144acd7ad72a94 SHA-256: ef496f41afa5951f28fa5d4a7c68934f14ccde3e7aecd85a08a35e8a9f225e66
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic for a malicious redirector link. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious IOC is the ttraff.com redirector, which is likely used to funnel victims to a phishing or malware-hosting site. The document body contains garbled text but includes the malicious URL.

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.com/pify?keyword=modo+de+produccion+esclavista+ventaj
    • http://files.tangolikeaboss.com/uploads/1/3/0/9/130969356/talizo.pdf
    • http://files.spaalamode.com/uploads/1/3/1/6/131636954/sifimokup.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/calendario_mundial_rusia_2020_horario_chile.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0435/8288/1947/files/low_voltage_surge_arrester.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/insurgent_full_movie_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/dogut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/56686822524.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/zawosajukexobugago.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/the_brothers_grimm_spectaculathon_one_act.pdf
    • https://cdn.shopify.com/s/files/1/0437/4206/8887/files/windows_localhost_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/design_patterns_java_8.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_off00006f19.bin
1688643257f123f299b31e875140d64372f9c21c70ec4b872af57962c11871d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F19 5208 bytes
font_01_sfnt_off000080ee.bin
d8c12a54e5af2bb697a20907d11dbb9773fe3abdbe633ea7ee7c93c76130a552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80EE 10992 bytes

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