Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc5a487caa576cc…

MALICIOUS

PDF

63.7 KB Created: 2020-09-05 05:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a909c16d73eca177af074a02994e17cd SHA-1: b783be9ff0ea63b9910b59843678f4b3ca590d16 SHA-256: 6cc5a487caa576cc75f8be2df701e040972500de19309e004d2d4b1a5c38a139
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.me'. It also exhibits characteristics of a PDF link farm, with numerous external links. The ML classifier strongly indicates maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to disguise its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/pify?keyword=ridorana+lighthouse+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5398/1589/files/house_architecture_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/ethiopian_airlines_crash_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/ginowuvudovolabiwul.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/nano_text_editor.pdf
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/25293861583.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/86194812734.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/32607002448.pdf
    • https://static.usrfiles.com/ugd/4c4e45_1a3c032016164ce1ace2f4e30b4d7b25.pdf
    • https://static.usrfiles.com/ugd/576447_458063ddbe724105b1ef32cf9f346c80.pdf
    • https://static.usrfiles.com/ugd/762c1a_4b2b4bd5180c439a86366b4b818dd8a2.pdf
    • https://static.usrfiles.com/ugd/0dd040_5c74d6cba5fe4d2892fd7eae29da0c85.pdf
    • https://static.usrfiles.com/ugd/eed56f_23cfc2159cd94f0a91677472154ea381.pdf
    • https://static.usrfiles.com/ugd/62e2c1_23a78e1fe74945bbbf336b4f69f6a1ab.pdf
    • https://static.usrfiles.com/ugd/b0c8dc_8d4aeab3621f4d0595e4ffd6add68426.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d87.bin
6cfe354d313f908e42920c56c2ccdd736f1a1786de2abdce5a0bf815942357c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D87 5092 bytes
font_01_sfnt_off0000aed1.bin
f2d0f451711ecc381240af78d87d040dba9bc9541cc0b54770a783719239b216		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAED1 14624 bytes
font_02_sfnt_off0000dcbc.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 16092 bytes

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