Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d1a0eb9c2d4750…

MALICIOUS

PDF

60.8 KB Created: 2020-09-01 12:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10aa15d7df3b611c78f56fa3eb504db6 SHA-1: fff84a8ebec245989a0d3f700d223457a3b7ee91 SHA-256: c6d1a0eb9c2d47504a83c0e8d1495da091dd331ee4072b05bfa85279eb5cd654
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=piscicultura+en+honduras+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious.

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=piscicultura+en+honduras+pdf
    • https://static.usrfiles.com/ugd/d4da64_7b8fffc2be5548cbb541f3875918e5a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c336f6b72fef46c2bcc4e53015fc24bc.pdf
    • https://static.usrfiles.com/ugd/88a84f_1dc94dc660a3418eaed056cfd260d7e1.pdf
    • https://static.usrfiles.com/ugd/f4de5e_8a67fef21d2a405fb65f3ee8d25066c3.pdf
    • https://static.usrfiles.com/ugd/ea2f88_53725d6532424767b5f8875f8eea0b03.pdf
    • https://static.usrfiles.com/ugd/e1d12c_68cc51cb07ad42ff966e133aec4950da.pdf
    • https://static.usrfiles.com/ugd/bfbc46_80f0cf3aed7a41c7b5354efc3d2daffd.pdf
    • https://static.usrfiles.com/ugd/0c4177_589d99c6b1b34090be9ee1a1690cf0b3.pdf
    • https://static.usrfiles.com/ugd/912de2_463c7c2c1cfb4afbad714be1e07ecc7b.pdf
    • https://static.usrfiles.com/ugd/e1d12c_2cc5338dabd44efc92219ebe35434faf.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/dibujos_colorear_dinosaurios.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/applied_optics_and_optical_design.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a09d.bin
7eb8cdb03fb7437301d40bb7a16887239ee530d7d96d93a6a728bafb42cf2259
pdf-font-stream PDF embedded font (sfnt) at offset 0xA09D 5128 bytes
font_01_sfnt_off0000b1f5.bin
f3ff9ad62165e7024af0f68132f7dea2c7304df526739cccec0c26915ae87dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F5 11152 bytes
font_02_sfnt_off0000d67b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 4324 bytes