Malicious PDF — malware analysis report

Static analysis result for SHA-256 6186a2223808479f…

MALICIOUS

PDF

35.5 KB Created: 2020-08-29 20:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c67b7eec9008ce89d89d58738c599343 SHA-1: f86dbc6de82db4dc96116a33a7f381cce1a12ac8 SHA-256: 6186a2223808479f9359905be476a16647cd34e63d705844076487243eb67181
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, also contains the same redirector URL, suggesting an attempt to lure users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=one+day+lyrics+matisyahu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_20f2a63ed025432e8c3b46eb407c12ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_e303e836fcfc4286a25534a1be6a9e77.pdf
    • https://static.usrfiles.com/ugd/b8c837_3085020aa0f5482d9b86b8fde5c99ee7.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_3550110bda144bd792b0718b18da3425.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bd0e40eb6e04721a88f651f4d4435b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_846036e69e6343b0b7201ca470aaed1e.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/aditya_hrudayam_lyrics_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/94019826921.pdf
    • https://cdn.shopify.com/s/files/1/0433/8221/0725/files/mesonizigu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/zorulasapegolomamelijuj.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/78172716880.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5d220dd90284c729c86f96fde353a67.pdf
    • https://static.usrfiles.com/ugd/73c254_2efcef68669a4ee09bd35b711de3e0d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_39fa68e8b4c941a9846abfb26b07b9e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_dac046756b5645e0902e25a83b11bb75.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb2c15093a80485a9d851f595bd3b2e4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fb4.bin
e51890b39e8fd7cc64f3b7283bb0c614ee7b37ec501f8b053e0ebd708ebba72f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB4 5308 bytes
font_01_sfnt_off0000619b.bin
ae7439867c96d1c24fb3aeb676adddf9d320844424290b7a6ab6620819d91594
pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 9180 bytes