Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0d0fcae02cd3bf…

MALICIOUS

PDF

109.6 KB Created: 2021-01-13 08:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ea0455bcadb61c9c8813604950088f6b SHA-1: e6b69b579a281dfcccb9b9b5ad22e7f510f3685e SHA-256: dd0d0fcae02cd3bf47d208e5959a1258cfb2f9077d165123d8c4843f1315b051
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, directing users to various external sites. One of these links, 'https://cctraff.ru/aws?utm_term=best+games+in+the+world+2018+android', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to be junk data, suggesting the primary function is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/aws?utm_term=best+games+in+the+world+2018+android In PDF document text
    • https://static.s123-cdn-static.com/uploads/4388407/normal_5ffd2b189a8e6.pdfIn PDF document text
    • https://site-1175385.mozfiles.com/files/1175385/slayer_guide_osrs_1-_99.pdfIn PDF document text
    • https://site-1178965.mozfiles.com/files/1178965/98606497604.pdfIn PDF document text
    • https://site-1175829.mozfiles.com/files/1175829/difokol.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/2IB0aGU/lupotixomuwesu.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/g0jbFGP/pacify_her_roblox_song_id.pdfIn PDF document text
    • https://site-1168221.mozfiles.com/files/1168221/stokke_tripp_trapp_baby_set_black.pdfIn PDF document text
    • https://mejotumuv.weebly.com/uploads/1/3/4/6/134636951/14a46c98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388271/normal_5fde25fdb0776.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fc5d3d925bf4.pdfIn PDF document text
    • https://site-1188059.mozfiles.com/files/1188059/73736436006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412902/normal_5fa0697164c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fceda7ba8082.pdfIn PDF document text
    • https://site-1175393.mozfiles.com/files/1175393/wish_meaning_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426072/normal_5f9f7f974257d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD6 7588 bytes
SHA-256: 51a8b24a89f1d4664e1afa2348c89104f34b737cd1be6b5783f2fe4f45ff25e0
font_01_sfnt_off00015494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15494 5900 bytes
SHA-256: 0a2547db1119d74607279b3cca1ee074d5fbc332152fe4771de7f9e2ed1dfe33
font_02_sfnt_off0001688f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1688F 12512 bytes
SHA-256: dd6e2c5fde3be3777f136ac043a561c0b86fc39e2c0c6a35c8caf149cafedca1
font_03_sfnt_off00019242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19242 16372 bytes
SHA-256: 9896b0e72fc416f8de0e3a07c87b5229a88193dd47a8c2303f37ca540b70ac3d

Open this report in the interactive analyzer, or submit your own file for analysis.