Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7a1825c8978f14…

MALICIOUS

PDF

48.4 KB Created: 2020-08-30 10:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bfcbf9a60872850ec0764f0b1467e55 SHA-1: 49cbf3c8fcc81f8c54263dc6e8f05c2eab5ce628 SHA-256: 0a7a1825c8978f14dce1065c8c8ec763c8ec105e4a94d49ab7e7357f791d5312
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to a 'travel packing list'. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains the same lure text and the malicious URL, suggesting an attempt to trick the user into clicking the link.

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.cc/wix?keyword=travel+packing+list+thailand
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/837d34_2c061011dae248179867cf054c7db7fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_32c6312b111143e9b23d8365ff89c140.pdf
    • https://static.usrfiles.com/ugd/a771bd_20d4b929cce743a089397fb0339c20fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d0af123cda44c79957a3a802be0fe8d.pdf
    • https://cdn.shopify.com/s/files/1/0438/9565/2504/files/43173867438.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/dixogowosaburovorufaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0510/files/12062488270.pdf
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/reluxejomakexakifuwe.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc080baa162646358e8b757e5896221d.pdf
    • https://static.usrfiles.com/ugd/63022f_110c9163a3df403ba5300004d4c7e572.pdf
    • https://static.usrfiles.com/ugd/b8c837_17210462a724451698488763164e7bf8.pdf
    • https://static.usrfiles.com/ugd/585b1d_18b42784a14f466f843892b7903db01c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0ea56c7aa4146cd89f05fe9798ac2d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ba8fa64ff2146f39c01d83a7ed68bbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_eebae45992ab439ba4e4491924dd2d86.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca5af8255dab4f77b418bf4e95e8d011.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_off00007e67.bin
7f8d1289ade573035e1f007e6b44f3edf5dc06b12736fbce5961bd0a7812b576
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E67 5408 bytes
font_01_sfnt_off000090cd.bin
4158fa69f155984724bb97a4f3c48eeef6d928a2356d5e790c39cac32bd19fde
pdf-font-stream PDF embedded font (sfnt) at offset 0x90CD 10492 bytes