Malicious PDF — malware analysis report

Static analysis result for SHA-256 692d86f20363b12a…

MALICIOUS

PDF

53.7 KB Created: 2020-09-05 19:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02209a3650e6d41a8f0cf4b34a76e96 SHA-1: 2d4df56f502f12bb5375753e6660714084ca4254 SHA-256: 692d86f20363b12a8103a4d6e83da6a3578b1e966d756da5b9f7e1a1811db0f6
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/wix?keyword=mamu+sange+jaithili+baragada+hata+song. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to other PDF documents. The document body contains garbled text but includes the same malicious redirector URL and several benign-looking PDF URLs, suggesting an attempt to disguise the malicious intent or engage in SEO poisoning.

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.me/wix?keyword=mamu+sange+jaithili+baragada+hata+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/440e29_4c1a2dc95b9f41eab946a01e604968e7.pdf
    • https://static.usrfiles.com/ugd/8a419d_27fa52e595ac4d258bf9122da46c59d3.pdf
    • https://static.usrfiles.com/ugd/1a89c8_9baf34f325c94ce2b534450f891d25ca.pdf
    • https://static.usrfiles.com/ugd/8b49c6_e11fad9b212f48dba573bbc9fc0de9f8.pdf
    • https://static.usrfiles.com/ugd/f103bb_cdb7c32f9653481b816038c664c57c6f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a6048dbb0ca424ebf1ff9e8cf645d5b.pdf
    • https://static.usrfiles.com/ugd/d5cf39_561c338b19ef470391cd3143befce5c5.pdf
    • https://static.usrfiles.com/ugd/6f58fb_a50dbb14881a4b8a9b328166aeafa1c5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8938/6901/files/16531309564.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/jzyk_angielski_dla_pocztkujcych_irena_dobrzycka_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/5567/5552/files/el_alfarero_letra_rene_gonzalez.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/american_english_file_5.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000660c.bin
b739ed280e21ffa18c17a92b33b094fc635000242937ed0c8ad62e0e2b269eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5460 bytes
font_01_sfnt_off0000787b.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787B 3720 bytes
font_02_sfnt_off000083d6.bin
ac7b0a74effd872bd777ba3f3082f2a336561b813e37e8e706b5a656a00ec6d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D6 2052 bytes
font_03_sfnt_off00008d6a.bin
1e34152fd620343cca54c506a19b23769848bd62d099adabe807f2238ee61669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6A 10456 bytes
font_04_sfnt_off0000b046.bin
e0e6305cd77acafd6472729df60bf6fe96ede28aab4de79dad58e7894ef0a564		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB046 16604 bytes

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