Malicious PDF — malware analysis report

Static analysis result for SHA-256 1403f97e70c30880…

MALICIOUS

PDF

43.5 KB Created: 2020-08-16 22:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8e1280ba0fd2439ceae7cc3bf61d036 SHA-1: 10a3895f1a070bbeb909460980ef53beb7c950b0 SHA-256: 1403f97e70c308804229151abf2b7a70281367434977e764f35b94dc7e31c4fd
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous external PDF links, many pointing to benign Shopify domains, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted, but the PDF structure itself is flagged 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=cyclone+map+information
    • http://ratorigu.infiniteaction.net/uploads/1/3/0/8/130814297/1b17df5.pdf
    • http://ziker.just5minutesaday.com/uploads/1/3/2/8/132814342/8826712.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/8933/4177/files/adobe_captivate_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/panasonic_cordless_phone_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/7332709455.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/rogers_commission_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/numivobewimepedivow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/zezupelekuzuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/77819609985.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/57809947230.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/gixavavofetovubuvo.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_off00006dd0.bin
5aada0b9216a0ba574e642d618e5e74a53397c54e023e57400fec4f36a699289
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD0 4988 bytes
font_01_sfnt_off00007eb2.bin
0cec90f9790bbcb0b674298228c5b3edec79785258c5da144df3f2ddea3d7a22
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 10244 bytes