Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a89695c61f062a…

MALICIOUS

PDF

85.1 KB Created: 2020-08-03 13:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf23c7a79a41005d4bbfc9191c1a761a SHA-1: 0ec32d8ad1a8326def435e1175cb4a095661abc0 SHA-256: 15a89695c61f062a27220394d15f135086d038bab33d19a9965a0b2b2cbe81ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to research PDFs and a URL that appears to be part of a link farm designed to attract search engine traffic. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to direct users to malicious content.

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.com/pify?keyword=characteristics+of+ethnographic+research+pdf
    • http://files.sitesofpassage.org/uploads/1/3/1/0/131071240/455213.pdf
    • http://files.ninjamagik.com/uploads/1/3/0/7/130738673/eaf9eec3494ec.pdf
    • http://files.sudensuukon.com/uploads/1/3/1/3/131381046/1731382.pdf
    • http://puxufuxen.nadinebertalli.com.au/uploads/1/3/0/7/130775413/a42a6c.pdf
    • http://files.5537gallery.com/uploads/1/3/1/6/131636954/2116971.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xoperesotojazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/90075974610.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/pukovunove.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/vowofinis.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/11261987678.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71419102660.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/mepomimosixoluramexup.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/32751940777.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/us_street_address.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd4b.bin
b018955a54eb073e01b3e6970f02ff636c73b4871f56c7b6d22f35491209ae1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 5196 bytes
font_01_sfnt_off00010eed.bin
f0d460a6a9115e5f54b8c311fbab3b6b0957fe8bf78e2f6e7ccc8eca3c93f5ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 13072 bytes
font_02_sfnt_off000138ba.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138BA 4324 bytes

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