Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f71c6020ef66e2b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 18:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e26d9eba0100c351fedb32bbd6e8b6a6 SHA-1: a44b80358a28aa7a8086b74e34d46962909f33b4 SHA-256: 6f71c6020ef66e2bc3d5f1618da6c7bbc272f45bb6b87c994cc701952e11458c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to manipulate search engine results or distribute further malicious content. 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.com/wix?keyword=arithmetic+and+geometric+sequences+crossword+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/dezekeviwunelagereg.pdf
    • https://cdn.shopify.com/s/files/1/0464/7888/5032/files/ninaleru.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/tedulozowotezaxu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/the_administration_of_justice_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/minecraft_server_1._12._1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dc7f39e312144e18ce24ed2f66e7f4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e125ae4e91294d01ae199ca72fba06ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_764dcd0bbcdf41518aff5b515259969a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff2533c4c3f4d0db9f272b2c5c62050.pdf
    • https://static.usrfiles.com/ugd/299074_2959d7e2867f4951860f87b33b1bde8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_cac89a27fce747b0a6f67eab3ad22d83.pdf
    • https://static.usrfiles.com/ugd/b8c837_955cc8c129214fe992c80447ae5ef0ac.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/moluwuzub.pdf
    • https://cdn.shopify.com/s/files/1/0435/9333/4952/files/bridger_bowl_snow_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006201.bin
7eee23a1613e7b6cff4873afd24cbe08ac9bd7af594b01e79d444a30a036b469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 5476 bytes
font_01_sfnt_off00007473.bin
f7a2ec3cef059a4fa79a1ca2fa6d977749c959c30c50f5480d4ce3c905ec398f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 10612 bytes
font_02_sfnt_off000098a8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A8 4324 bytes

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