Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2e7fea89c32a70…

MALICIOUS

PDF

48.4 KB Created: 2020-09-05 05:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 175e1a1b2d701a4275691db2aa6532de SHA-1: 63c0ec86fe548cf78ee167cbf897c39fd3ddac40 SHA-256: 0d2e7fea89c32a70d0f60050dae91ad36372ec42bcb1e12dd51d330adfe03b97
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, masquerading as a font resource, that point to a malicious redirector. The primary URL, 'https://ttraff.club/pify?keyword=chewy+regular+font+free', is flagged as malicious, indicating an attempt to direct users to harmful content. The ML classifier also strongly indicated maliciousness.

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.club/pify?keyword=chewy+regular+font+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_9f5cb8898cb2475daaf71e0dc8e3a51c.pdf
    • https://static.usrfiles.com/ugd/cec570_1380adb5c76c4ec8a70898574a9accc9.pdf
    • https://static.usrfiles.com/ugd/9fc8c3_12f3bae3afa14d0cb917990d0a119886.pdf
    • https://static.usrfiles.com/ugd/35e1ce_6e350c8ec5644a96a4e0b7b7ae489287.pdf
    • https://static.usrfiles.com/ugd/61b8bf_0f253f37562246639e6f999f7a507f50.pdf
    • https://static.usrfiles.com/ugd/868f76_a87d355c88254bdebc27386a6d6564a2.pdf
    • https://static.usrfiles.com/ugd/3b7182_55a541c34cf9464ba31ed53fe89fd910.pdf
    • https://static.usrfiles.com/ugd/7ff653_d4b4b05e70c6464c88bd933b493106c4.pdf
    • https://static.usrfiles.com/ugd/a1fb72_c13bcaec4c2943308cd9b77638ec0e0c.pdf
    • https://static.usrfiles.com/ugd/8e9e2f_3afc5a015ef44015908b800cfc6d07ae.pdf
    • https://static.usrfiles.com/ugd/e2c250_e8b10d9551784051883d4e772af574ec.pdf
    • https://static.usrfiles.com/ugd/756799_2c1667fd05ee423baca8a53a4c1d9894.pdf
    • https://static.usrfiles.com/ugd/be19e1_c193a9fb360a4080aa13151237ebbe67.pdf
    • https://static.usrfiles.com/ugd/510a18_dcb31062e5094bc5abe6399862c88e4d.pdf
    • https://static.usrfiles.com/ugd/19ce5d_3f259980fb5e4630bdc8f9d71f218ad9.pdf
    • https://static.usrfiles.com/ugd/5ecadc_d75a5fb5444d4c56830e377083182959.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_off00005d02.bin
3bdbcb4d1a54bcfac06e4affe7fdbc6af769cade0e6429c05868ed5da69eb624
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D02 4948 bytes
font_01_sfnt_off00006dec.bin
d7259b349b3d760040b02ceafe6374334b5991ff5c2d4f36527329ece88dd97d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 26952 bytes