Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2ad30dfca5ee3e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-29 00:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f305eb2afca1c8e6b096a3d944ed528b SHA-1: ee2c1e38cddb65d419cb8bab0dbdcf635c2ab65b SHA-256: 6b2ad30dfca5ee3e7ab516af42eb6a50fea9a241538842d6bb03b0a20c7d829b
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the text 'Bachata en fukuoka mp3 download free' and the malicious URL, suggesting a lure for users to click through to potentially malicious content. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to distribute further 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.cc/wix?keyword=bachata+en+fukuoka+mp3+download+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f41957d4c934435c9073354f6dd72eb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef67c5ab21bb41e488be146e5a65d030.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbd93ee4301402d84b82ea47b436e8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e35fb9174f764b579e129f622a8f2444.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2181/files/39729801413.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/lukapuriralexus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/vosorefinewumonotasuna.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/60946831495.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7faf0c4d8464fb0b9004b021cb2f28d.pdf
    • https://static.usrfiles.com/ugd/b8c837_391db7380744424399de97419540c03f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bea4a461d9d497e95025f9ffc078a22.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3dcb6f9f96d49f39e6506ed47859c05.pdf
    • https://static.usrfiles.com/ugd/b8c837_230e54ad78f74a5ca0fe52ef384afac6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d37f782aa0d8453083f83d42f24afbc5.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_off000054da.bin
96bfe85165183a40250d8c37b32612fdfa1807097eb9b392e0c915eaa2aa6b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DA 5588 bytes
font_01_sfnt_off000067ba.bin
0cf4d22e89d8f9169cccc51d3ebd6aa675aaa9b688915a31054c25569cd8de13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BA 14336 bytes

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