Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b30723817e8416…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 22:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de36243d53cb298775f6f0945ce885d5 SHA-1: d1ea1910d66c17d376b08f503b80cc12054918de SHA-256: 04b30723817e8416621b3bcad74edd7213ee63dfb06ed5a99a5dd89c92ec3361
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://ttraff.cc/wix?keyword=chrome+browser+for+windows+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into downloading software. The presence of numerous other links to PDF files on static hosting services indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=chrome+browser+for+windows+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/dcfb95_507cad7bee5e40818243a7955973e001.pdf
    • https://static.usrfiles.com/ugd/191a6d_ed66d402dadf4bcfa6312760e93e4d06.pdf
    • https://static.usrfiles.com/ugd/5be868_1922729e98594cfabf4953cecccc7383.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fb55a0add6e4304b3a96b56f0bdc8e2.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/28021490425.pdf
    • https://cdn.shopify.com/s/files/1/0430/7442/0890/files/photo_editing_picsart_photo_studio_android.pdf
    • https://cdn.shopify.com/s/files/1/0465/5028/6494/files/barbados_us_visa_application_forms.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/building_materials_and_construction_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/10328586739.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3950/files/38444724988.pdf
    • https://cdn.shopify.com/s/files/1/0439/0099/3704/files/lg_magic_remote_an-_mr600_user_manual.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_off00005e62.bin
75e1a4091d6d6c8e6fa49d87eace580f4545acf6e5ffb4ff1bbbcc02ed3d66df
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E62 5040 bytes
font_01_sfnt_off00006f67.bin
e2e798725bddb215a068a57f4b36ee07cf8c3263b7fa15bbceb5cfc45d35d41f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 10100 bytes