Malicious PDF — malware analysis report

Static analysis result for SHA-256 4617570d2332a339…

MALICIOUS

PDF

58.1 KB Created: 2020-08-19 00:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c38d51c8f5e39a369e22c6d8a3f8c6b5 SHA-1: 1f99dcf59d1e79021c82d1aa81c567d8302dc6b2 SHA-256: 4617570d2332a339652d83d8e36404922c4dcefb556e9ff66abd93b5738b2317
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, appears to contain the same URL and a reference to 'Army greens uniform', suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely a user clicking the embedded malicious link, leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 2

  • 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.
  • 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=army+greens+uniform
    • http://files.santafevintage.com/uploads/1/3/1/3/131383588/8220717.pdf
    • http://files.bysophschnei.com/uploads/1/3/0/8/130814754/purutoxezebujat.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2557/files/nios_offline_admission_form_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/antiemetic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/808_mafia_drum_kit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/78044156954.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/vocabulary_words_for_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/b._v._ramana_higher_engineering_mathematics_mcgraw_hill_education.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/add_text_box_to_free_online.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_off0000a926.bin
e2adc7063ea78cf06ea9917f4a5541b161709d4d8aa8d99228368a41043b3226		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA926 4936 bytes
font_01_sfnt_off0000b9e8.bin
24cf0384a13714cb68f13cbbc602673bdb6bcccd95d289bb80f327e8f67eb389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E8 10032 bytes

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