Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e04e3aff7c910f…

MALICIOUS

PDF

39.5 KB Created: 2020-08-08 16:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c581e382819dfa143566aea9c513c196 SHA-1: d2b1f0fafc9f06ba5961d03ad52c00dd90cbf41e SHA-256: c0e04e3aff7c910fc7137de631bf3e6d504d2b67064597593b65be07c8c12021
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=catechism+of+the+catholic+church+second+edition+pdf+download', is designed to redirect users to malicious infrastructure. The PDF also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. The ML classifier strongly indicates 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/pify?keyword=catechism+of+the+catholic+church+second+edition+pdf+download
    • http://files.mkspraytanning.com/uploads/1/3/0/9/130968956/aee4d33e6052.pdf
    • http://files.agroproductsent.com/uploads/1/3/2/8/132814050/5a79e384d31b.pdf
    • http://files.janelletherien.com/uploads/1/3/2/7/132741176/rebozokesij_makemoripapu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0351/6824/files/20798192733.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77650869017.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/81919989641.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/95281900575.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/xazosewinilokowokibigexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/jixiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6140/files/pejatosubewizujamikejoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/4537/1549/files/consecuencias_de_anorexia.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0981/files/12844680745.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92283418618.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/team_extreme_launcher.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/bpmn_notation.pdf
    • https://cdn.shopify.com/s/files/1/0438/4086/4421/files/xulotakejosikono.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a57.bin
65debbf2a00bc9d19b5353e9df8aa056f27e8b4b6e3a615504a8507ed937190f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A57 5392 bytes
font_01_sfnt_off00006c92.bin
6e6b6e6cb2959637a4f109ff8ce0cda6bfe39f4ba214260d9b9ca40394e9cf5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C92 10536 bytes