Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9bad2654720faa…

MALICIOUS

PDF

41.9 KB Created: 2020-09-09 09:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4771d62eab0bbbf26efd93439276be1f SHA-1: 717414b7908b8ee709f6c3e1a8a4f42aae4a58c2 SHA-256: 5d9bad2654720faa151630dbf0649bcf9919578adf529f7fee377c93ec08d9db
154 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded URLs, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One URL, 'https://ttraff.me/wix?keyword=a%2527+pieu+icing+sweet+bar+sheet+mask', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the embedded links and the redirector URL suggest an attempt to lure 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.me/wix?keyword=a%2527+pieu+icing+sweet+bar+sheet+mask
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/12f4eb_861a161c956f4ce38c426f2295a06933.pdf
    • https://static.usrfiles.com/ugd/ade4e6_0960fdbe18f34804891c648d140ea955.pdf
    • https://static.usrfiles.com/ugd/cc14e4_1afa5289ff38412192048d2e87e2f783.pdf
    • https://static.usrfiles.com/ugd/3b47cb_e40c2c37f69a4f7a9fd3563ac19db98b.pdf
    • https://static.usrfiles.com/ugd/3de8a6_4e0bde59db9c4d02bfa0129fd60c5b5c.pdf
    • https://static.usrfiles.com/ugd/78daac_a4e93117d2a84cd39d9a67f9012ba0e7.pdf
    • https://static.usrfiles.com/ugd/7d21c0_e3c6b2c3172c44419d0101c3c30265e0.pdf
    • https://static.usrfiles.com/ugd/a58b01_49daef78141349e7aa29969bf5e52fb7.pdf
    • https://static.usrfiles.com/ugd/36f25b_9584bc988fc34e17b9fac0989afd2333.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5cb405eec374da292893a431cdc0498.pdf
    • https://static.usrfiles.com/ugd/83e24f_905fe1abb830482d9c74d8c6ef7d70fb.pdf
    • https://cdn.shopify.com/s/files/1/0436/5117/0457/files/pugurogojovevanepejor.pdf
    • https://cdn.shopify.com/s/files/1/0463/1196/4829/files/kanogabigijozusutipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/47101199675.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/62161668667.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_off00005737.bin
34864ec66a61f457acabe06ecf146e5700bf71f7c01849081cb6b228c53f273d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 5408 bytes
font_01_sfnt_off0000697b.bin
25bcc84c55f06fe8d1a06d1576d5900ef3edceb00c489e649ff9ace40c97eb6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 10248 bytes
font_02_sfnt_off00008c9f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9F 4324 bytes

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