Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efce3e019fbabd7…

MALICIOUS

PDF

49.7 KB Created: 2020-08-31 07:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 512b0584f611ee159a51d80efc9d303a SHA-1: aec1be7d4ebadac297d3adeae622792c97a7b66e SHA-256: 6efce3e019fbabd742d24b86a125110e9713dff09e45ff3f69a599fad74c3cf2
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, suggesting it is used for phishing or distributing malware. The document body, though corrupted, contains text related to irregular English verbs and the malicious URL, indicating a lure to trick users into clicking the link. 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.cc/wix?keyword=verbes+irr%25C3%25A9guliers+anglais+pdf+4eme
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/91742327675.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0167/files/cisco_jabber_iphone_end_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/44809958515.pdf
    • https://static.usrfiles.com/ugd/f523c3_3e634c84d0874e0da347143d43742e8f.pdf
    • https://static.usrfiles.com/ugd/26481d_882a3ff3b4b3401dacdd5cae1eee64e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_35f541860a7a4d03b64aaf45e2b94f5f.pdf
    • https://static.usrfiles.com/ugd/c5d40f_2816b7839b484bb3ba997927db7e4dd4.pdf
    • https://static.usrfiles.com/ugd/a771bd_6002f18e93194b0886aa15b02f0fa8c9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/tukakogugiju.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/rikujilowoxupiwadibe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/venibaxilufugegomapo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/fumipedimugabojika.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3363/files/cognitive_behavior_modification_an_integrative_approach.pdf
    • https://static.usrfiles.com/ugd/defcb2_02827a72225b4bc6bbfcb812b0cf4027.pdf
    • https://static.usrfiles.com/ugd/b8c837_93b4572677104355af90d49a0f99de73.pdf
    • https://static.usrfiles.com/ugd/04e6f9_2f0e78504128404b94c7213b3084b317.pdf
    • https://static.usrfiles.com/ugd/49be48_e4a9d417c6df40a8b2ed14dfe92c2305.pdf
    • https://static.usrfiles.com/ugd/10e3af_318fea4ec02e4a21a7368a60d3fc21d6.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_off00007704.bin
14f53a5e4f39c774bb8a297708c950d71b999ab63fbf7c16be1c04258b53361f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 5696 bytes
font_01_sfnt_off00008a06.bin
0b9135054a7608e28bb3e2f77f5fd9b01b50d3303e5afacbbaffb4f78ec68fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A06 14864 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.