Malicious PDF — malware analysis report

Static analysis result for SHA-256 66beb47f957932ed…

MALICIOUS

PDF

56.4 KB Created: 2020-09-01 03:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9493e466d5611d460317dc72b0fb89f3 SHA-1: a74d6d4901b1f7be506e7147f56ce66225abc93c SHA-256: 66beb47f957932edfd976f127370b17e630535bb1f995a2c89f89b8c112a25cb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=extent+report+testng+example', indicating a probable phishing or malware distribution attempt. The ML classifier also 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.cc/wix?keyword=extent+report+testng+example
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_4acfadd291864b518481b4509a48d2e0.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_af9b1e42c1044da5ad7195e0f2e7f826.pdf
    • https://static.usrfiles.com/ugd/b8c837_25bc10c4aeab49bfb623038ca7ad96a6.pdf
    • https://static.usrfiles.com/ugd/9a242c_96bc6c3886674ad29dc56e80dc6e91a7.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_8a9ee645bc4b4cd99c1b6975bb514f7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_eae511e1d280401e82e865bf8488f0b6.pdf
    • https://static.usrfiles.com/ugd/77941b_997b3bec11884ba49557be58991c6b17.pdf
    • https://static.usrfiles.com/ugd/d775a9_a3757f0910334c37ae1dbbd1bb5f3b49.pdf
    • https://cdn.shopify.com/s/files/1/0465/0218/3070/files/vuzariwefumugopujekesujen.pdf
    • https://cdn.shopify.com/s/files/1/0438/8097/2456/files/88518688446.pdf
    • https://static.usrfiles.com/ugd/3826db_47da0cebd719489ca858e3c31f0cbf52.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4c5a4c552b24ff7ade7d7a220749a44.pdf
    • https://static.usrfiles.com/ugd/cfa91a_ad483a9611c5431aa616cc3a68506340.pdf
    • https://static.usrfiles.com/ugd/8cbfce_f7bb3dd825a5462581f2f56f9ef792ea.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c1.bin
828b709d2a5bd886991a00240e2a2f1bf3103e43e3c5b064df3bb98a513f6462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 5164 bytes
font_01_sfnt_off0000843c.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843C 1800 bytes
font_02_sfnt_off00008cca.bin
98aff14c6f2c095af901f557335bd8a5cd94b03caead3aa3b39cc0b0a6f778b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCA 15820 bytes
font_03_sfnt_off0000be51.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE51 16312 bytes

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