Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b45feba732d1c7…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 10:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 363482f00e22064a9c325b339852de9b SHA-1: 4d2e8f22c812e3b42a742dc6b84ac07469391fae SHA-256: 68b45feba732d1c7eb65c4a2c2c16a4db2953e3d92fb758aad4fdf14f4c1df00
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' heuristic and the embedded URL pointing to a redirector suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and link analysis indicate a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=the+amazing+spider+man+android+oyun+club
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_356757b73cb642b19deb0bff8ac64bd6.pdf
    • https://static.usrfiles.com/ugd/b11f6d_538d725285184917a9f20b304b1b9ab1.pdf
    • https://static.usrfiles.com/ugd/dd4472_63baf8ea967c4d8f8fa4039cabb677bf.pdf
    • https://static.usrfiles.com/ugd/3e87bf_a985dba6bc5940d6a64411be7af91289.pdf
    • https://static.usrfiles.com/ugd/b8c837_9457d1d0d431470e8844057789c5ded9.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/jegileleneg.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/24312872124.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/52966707740.pdf
    • https://static.usrfiles.com/ugd/7baf93_3ac4e514d0fd4ec89599a6aa60bd8b7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_91535c8b0e1d4282bde917d7e437ca87.pdf
    • https://static.usrfiles.com/ugd/73c254_6aa37ec0742b4f018d55d7930f9818fb.pdf
    • https://static.usrfiles.com/ugd/74e905_efa87bd21d6c43eb8788398b223791a8.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/wesco_financial_services.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/jebadifape.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_off0000628f.bin
892e62fc69ddff6c737ab5216085e950742495ecb2f9617ad2be18510f711e9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 5728 bytes
font_01_sfnt_off000075e7.bin
cf7278ca4c6cb34155e8590f9968838afaea0f78ec59376ba7fa1627a4e489eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E7 10412 bytes

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