Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce287084c085e52…

MALICIOUS

PDF

42.6 KB Created: 2020-09-03 12:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad37824984c59d4dcb810a61a27369c2 SHA-1: b19dc8aa506c903552eb72c10c628b3c3ecf1d74 SHA-256: 5ce287084c085e52ddd443ec0275892678afd3de704e5c8e1a78bb5247f156b4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'uniform crime report 1990' and a URL that matches the suspicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting 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.club/wix?keyword=uniform+crime+report+1990
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/1cc7e8_8c961f3322f6469fa1a8cc4fce4fd7a3.pdf
    • https://static.usrfiles.com/ugd/07e02c_f288d33c0ea64e10a847614541c75c8d.pdf
    • https://static.usrfiles.com/ugd/77941b_2d251bf7c68b44a083f1daa109a32b85.pdf
    • https://static.usrfiles.com/ugd/ca300b_55017ab645604090a2e0e8582b421733.pdf
    • https://static.usrfiles.com/ugd/b1b16e_3c496fef3af34ed4a9ab87efc9a9e475.pdf
    • https://static.usrfiles.com/ugd/90423f_93ac764d13424d73a7777ea39e842006.pdf
    • https://static.usrfiles.com/ugd/868401_696682fbb55345d78620e7c671b91558.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1265/files/61015452376.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3366/files/cerberus_ftp_server_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/carte_geographique_du_monde_avec_les_noms_des_pays.pdf
    • https://cdn.shopify.com/s/files/1/0431/7626/3841/files/jazop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/36129912796.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/tugepinewobali.pdf
    • https://cdn.shopify.com/s/files/1/0429/1067/9206/files/discord_for_linux.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_off00006843.bin
c51181c596a085f325aed9f78016c6042bed1f647b1f73cff58fa88c486f562e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 5084 bytes
font_01_sfnt_off00007994.bin
495c0ae057d880bb09ec94f5bb0757df30d0f4d5a51951378f3476a51e6c6644
pdf-font-stream PDF embedded font (sfnt) at offset 0x7994 11128 bytes