Malicious PDF — malware analysis report

Static analysis result for SHA-256 03dc6d658de16bcc…

MALICIOUS

PDF

54.3 KB Created: 2020-07-10 14:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b7ba3033edb9b65cbb878decd4682cd SHA-1: 17343341d062328839252b3648fdf1d37a522cd5 SHA-256: 03dc6d658de16bcc75dd514fa87aaeabaed0165811640045c5b5491107947298
162 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One URL, 'https://ttraff.cc/pify?keyword=aviation+security+international+magazine+pdf', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the embedded links and the ML detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=aviation+security+international+magazine+pdf
    • http://files.markhamgolf.net/uploads/1/3/1/3/131384771/76463.pdf
    • http://files.rvasings.org/uploads/1/3/2/8/132815178/45c615b5f.pdf
    • http://files.totalprosoccer.com/uploads/1/3/0/7/130775195/8220289.pdf
    • http://files.dinytots.com/uploads/1/3/2/7/132741149/693bc5.pdf
    • http://files.sisiholisticbeauty.com/uploads/1/3/1/4/131438571/bovigevudo.pdf
    • http://files.thecherryspringsranch.com/uploads/1/3/1/6/131606674/6205286.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zinetexis.files.wordpress.com/2020/07/dafulubukutukaf.pdf
    • https://senuxubu.files.wordpress.com/2020/06/38777055149.pdf
    • https://pinuraliwa9571753.files.wordpress.com/2020/06/58582901741.pdf
    • https://vuxiluxuda.files.wordpress.com/2020/07/19150826234.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/6614167855.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.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_off000094ef.bin
3473f3877c6b2f9af5f82e5e52c69b2dd2e38eba89ca438180e442aab460e06c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94EF 5560 bytes
font_01_sfnt_off0000a7d6.bin
e75405f0921155efb5552bab4c734a3d9e353ff99ea7c0b779f96bcf2e72118f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D6 10620 bytes

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