Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b756b75d73c9ceb…

MALICIOUS

PDF

263.7 KB Created: 2020-07-31 12:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d880017f91adbde446eccf00b4f87180 SHA-1: df8b4a3e4e4aaae82a6fec0b201c24f4b736dc66 SHA-256: 1b756b75d73c9ceb18618d3e31ff8d94ab8faf6524421e310eb79337210fbfb9
92 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. The ML classifier also flagged this PDF with high confidence. While the document body is heavily obfuscated and unreadable, the presence of the malicious URL strongly suggests a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 3

  • 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.
  • 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=hannah+arendt+pdf+deutsch
    • http://files.hwgirlsbasketball.com/uploads/1/3/2/6/132681545/bininifopin.pdf
    • http://files.riverside64reunion.com/uploads/1/3/1/6/131607005/labalemogisopovu.pdf
    • http://files.lizfinearts.com/uploads/1/3/1/6/131606598/4322990.pdf
    • http://files.alpharettapoliceexplorers.com/uploads/1/3/1/3/131379530/09cc9898acce.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/xomubilerup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0436/9698/0136/files/17203615963.pdf
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/xomesomaxuxipu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/50134879191.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90554838216.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/viwejevok.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9576/files/48678673214.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/pefujif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/lunigo.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/70756960419.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/dojubajinovet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.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_off0003d80e.bin
9027a060e713b687fe2f389170e20712bd4e53d424266686bbd1b8c9b776964f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D80E 4896 bytes
font_01_sfnt_off0003e899.bin
24dc18661b51de2677f2015eed094c945523336911db4a3e2ca28c21db40b912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E899 11972 bytes

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