Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecd99c8ba0b53cb…

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 09:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63703ac70019d23d9ce5f37dcc58e209 SHA-1: 2c703a9f8eb1e94ca07043f0fa11bb1a5216f710 SHA-256: 6ecd99c8ba0b53cb485e6ac364790344bcca351e7259741b480513330d7a64f8
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure, possibly related to a game guide, to entice users to click the malicious link. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or redirection strategy.

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=wow+eye+of+the+storm+battleground+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/824332_2f8243f531a541e595d9ff9d070ef86b.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_821eff97c6b7441fab25059971595052.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe995ee5fed4cb8b55b621b8130316c.pdf
    • https://static.usrfiles.com/ugd/8127dd_0e99220816854e31868e2aa8d3b72e61.pdf
    • https://static.usrfiles.com/ugd/f8de3e_0e65df90ab9d4ffc8716317a3a6cdea8.pdf
    • https://static.usrfiles.com/ugd/934fc3_b4d66498b7f74b5d9077f45e78e8e827.pdf
    • https://static.usrfiles.com/ugd/a640e9_0a18abc5d8f64775b6a27609177bdef8.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1821/files/xevogigasowakobis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0386/3459/files/48971311564.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99289858455.pdf
    • https://cdn.shopify.com/s/files/1/0464/6492/5854/files/37528443355.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/sinc_interpolation_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/budimipewisi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/aptitude_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/chasing_cars_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/offline_shooting_game_apkpure.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_off000066a8.bin
566ba292a15646aef6c501a0be141811868a5dd718a309ef8fb875a4f1867a26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A8 5548 bytes
font_01_sfnt_off0000797b.bin
48be5ee10801d0f06aefb0ae6a02d62cb861b9d6e534872f89e7c992c1fd0e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797B 10108 bytes
font_02_sfnt_off00009c15.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C15 4324 bytes

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