Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27311915442068a…

MALICIOUS

PDF

59.0 KB Created: 2020-08-05 17:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a700edabee2b69c7fa8cfc05ab070f5d SHA-1: e66cc2e46b993647a60d7cf2426277cb55f46c2e SHA-256: c27311915442068abd4451f65850478f31087b19b04c53e7afe94d9cc46a068b
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as educational material ('Mastering physics chapter 4 solutions pdf'). This link, 'https://ttraff.cc/pify?keyword=mastering+physics+chapter+4+solutions+pdf', is designed to lead users to potentially harmful content. The presence of a large number of external links, many pointing to Shopify, suggests an attempt to manipulate search engine results or distribute content through a link farm. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=mastering+physics+chapter+4+solutions+pdf
    • http://poper.child-poverty.org/uploads/1/3/0/8/130814229/5649844.pdf
    • http://files.closetluxeboutique.com/uploads/1/3/1/8/131856743/a1d276.pdf
    • http://lodebi.melismata.org/uploads/1/3/1/4/131438641/476c8d76e31491.pdf
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/pesesenodibokewogorepem.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/vopesomawuzirupuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/tojowerexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/45941198590.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/72244193101.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9491/7799/files/89886458796.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/honda_civic_2015_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/gisavorovexaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/55382749463.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/gta_5_gamestop.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_off0000a849.bin
9e4e8bb411ae446f3a7d53c6c3f720748220f156c02da15cf1d8cda1f4c1cbd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA849 5612 bytes
font_01_sfnt_off0000bb74.bin
f44e6dc2e0fc04003f773dbf94284dd6d7fdc2d0e1f56486f609e809a9472d9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB74 10400 bytes

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