Malicious PDF — malware analysis report

Static analysis result for SHA-256 539a543e9f5e0e23…

MALICIOUS

PDF

43.2 KB Created: 2020-08-07 23:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a32d139d354d4065b486fc9cecd4bb5a SHA-1: b002f707c03e4ced1c1fc271a24c81d2fdd8ef88 SHA-256: 539a543e9f5e0e2338959487044e292de4195951029c644cae250f2b97ca7178
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The primary attack pattern involves luring users to malicious infrastructure via these links, likely for further exploitation or credential harvesting.

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.cc/pify?keyword=cartilha+agricultura+biodinamica+pdf
    • http://nabeluget.northhadleysugarshack.com/uploads/1/3/0/7/130739678/jovosivijunorifaz.pdf
    • http://files.9thmediumregimentra.com/uploads/1/3/0/7/130738943/sufiritalibe.pdf
    • http://files.artbymkd.com/uploads/1/3/0/8/130873979/6244392.pdf
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/possessive_pronouns_vs_adjectives_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/wenesibelugomin.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/foxukexow.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/mojawofegirudokeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/ttd_telugu_calendar_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/jivapomepuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/9518080242.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3b.bin
34473c8ead58ab0ee60d7a9c7cc4d6e606143adf372b720fce75e2eb67741eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3B 5316 bytes
font_01_sfnt_off00006d14.bin
e858f7c767dcaf40d2ff482df5d0b5fd632c4b6c6f5fbe2ef19877f9539e0e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D14 11200 bytes
font_02_sfnt_off000091d6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D6 4324 bytes

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