Malicious PDF — malware analysis report

Static analysis result for SHA-256 04429285f44ae67f…

MALICIOUS

PDF

49.9 KB Created: 2020-08-31 03:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d33bd0293a4b672e77c280ee7a1935cf SHA-1: ba51e78bf190b2e1dfd0f0f08be67409876e779e SHA-256: 04429285f44ae67ffa33e8be5b73b0ecf34deda03fdacee30aa28e9798b772f9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains a URL that leads to a link farm, suggesting a phishing or scam attempt. 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.cc/wix?keyword=que+significa+fonologia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4395/3567/files/zajib.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4250/files/dodozutetafofafetizofagej.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/cash_flow_statement_format_direct_method.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/installation_des_cameras_de_surveillance.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/ripisuponaruriv.pdf
    • https://static.usrfiles.com/ugd/7f16bd_70eac5f651654654b02ccf18b8e26e3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_41dbe2e84a314494ad4f080c7dd49871.pdf
    • https://static.usrfiles.com/ugd/f967ac_99fd6e6bee2b4f9982ecb886fc9de0d2.pdf
    • https://static.usrfiles.com/ugd/80c1db_696a61a595b845ff85a605c985cf93ec.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_20cdec03abab46cf9e5319c437bae2b1.pdf
    • https://static.usrfiles.com/ugd/de02f3_96cc1545cf204ff38925df5cb3c87031.pdf
    • https://static.usrfiles.com/ugd/9757e7_1e1b67b9c16745108684016769ae303d.pdf
    • https://static.usrfiles.com/ugd/7f16bd_1f120a1cc4df44e18ab6f4cf4e5be944.pdf
    • https://static.usrfiles.com/ugd/b11f6d_4fe198b7890f44fdbcbd215a19356de8.pdf
    • https://static.usrfiles.com/ugd/45e30f_412c223e80e94d52849db167b6fd8e5e.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_off00007c57.bin
256b8f1d7847fb9bd33849944b5063748eaeb6925e87f838c41c7fc2f0cf3316
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C57 5016 bytes
font_01_sfnt_off00008d83.bin
e274d6b260f86c683fe8443bcb5e771c735b3ef51d36a4b2bfd48f31aa4fb015
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D83 14036 bytes