Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61cce36a793ecd3…

MALICIOUS

PDF

66.3 KB Created: 2020-09-04 21:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24f486817519aab70a070b1288d32025 SHA-1: 9963fd1e16ced1a2c50be4d829e15eb6d4c9f14f SHA-256: e61cce36a793ecd3ab0b7ad4bcafaec0cbc69d4e06ab3700e3718c3460f470ee
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL, https://ttraff.club/pify?keyword=medical+nanotechnology+and+nanomedicine+pdf, is designed to redirect users to further malicious content. The presence of numerous Shopify links, while mostly benign, serves to obscure the malicious redirector within a larger set of links. 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.club/pify?keyword=medical+nanotechnology+and+nanomedicine+pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/31538681654.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0947/files/libro_defensa_siciliana.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/47128990001.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/wilamosikonujexawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/python_dash_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/pavavukigarakal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/27565666534.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/bujanabasatarifu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/76640068789.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/topiwosixodudi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/10477977011.pdf
    • https://static.usrfiles.com/ugd/06497e_c92645ae71614390aea61bdf601898ef.pdf
    • https://static.usrfiles.com/ugd/ed64d2_2eb8cbe3ab2049ea8a6ee3ad4f507586.pdf
    • https://static.usrfiles.com/ugd/97634b_d374fc4a4fb0421098978e80c1be4757.pdf
    • https://static.usrfiles.com/ugd/7f46b5_299194b527034aae8750bd0471df92f2.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_off0000c3f9.bin
328b5b2c9fc5fb6f801d4b1872cf21a1eabc4726dc39ea18265c22fb051f95f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F9 5404 bytes
font_01_sfnt_off0000d64f.bin
af88984441469635b40d64295929b6d61fac152195ad3267eb95d798cbdc1573
pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 11224 bytes