Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb608ce7848484f9…

MALICIOUS

PDF

45.8 KB Created: 2020-10-05 20:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 49844e9d778d80efe5a1ac34d5f2e57a SHA-1: ea18648739503591ec6c4f3b406c3fa2ecb80375 SHA-256: fb608ce7848484f91558380da557cfe525f5bed0bd23b4d1bcae3204bc879d9b
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure the user into clicking it. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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://ggtraff.ru/strik?keyword=que+es+un+ludograma In PDF document text
    • https://site-1040668.mozfiles.com/files/1040668/77055603289.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/mesiwa.pdfIn PDF document text
    • https://site-1038337.mozfiles.com/files/1038337/45769550984.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/zorodakosezeji.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/xuzijezupibaset.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4eb98e-52cf-4593-a0bc-382439671e26/72582294142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e32a69-4c48-4224-81ed-04d6fa5a8e66/fenovifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c59db5-bc8c-43c5-abb4-7e064c361e31/foweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3848/4891/files/mixonorizel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8223/9137/files/the_clouds_aristophanes_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2730/3080/files/befokuvafegisosepugofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7898/7165/files/jowexaxekumigovabiwigupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/73674183394.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 5204 bytes
SHA-256: e336bc1302bdd40601b66c1af3055be2e8ea98652c064bfb3fc76c6a63df6693
font_01_sfnt_off0000872c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872C 11132 bytes
SHA-256: 53f107d7824378cc46191f8ed78bef9b51be9238887b9cc1f5e89e10ee7aa0c5