Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b074fe10656fe2b…

MALICIOUS

PDF

39.1 KB Created: 2020-08-07 05:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ba4dfe855361775549c7222d37c66a SHA-1: 42d2c8a5b8c973af6c44012e9ee9ccf6f3c123d6 SHA-256: 4b074fe10656fe2bef56983f5a72ee3acdf4cd811f669f3f8a91181f88afb01b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=battle+of+the+sexes+game+theory+pdf', is designed to redirect users to malicious infrastructure. The PDF also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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=battle+of+the+sexes+game+theory+pdf
    • http://files.simonbaeckens.com/uploads/1/3/0/7/130740158/1dd22c91ac.pdf
    • http://files.hermosahistory.com/uploads/1/3/0/9/130969129/megejokobi.pdf
    • http://files.bughunters.eu/uploads/1/3/2/7/132741194/muwemosavudajaminebu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5650/files/vikurawukarodeneso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/38705989989.pdf
    • https://cdn.shopify.com/s/files/1/0432/7630/4544/files/bexugowiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/38889196621.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/lubalenexasepiwizapewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/guler.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/waradulukumojifepekaduj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/64016615406.pdf
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/present_perfect_tense_mixed_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/pavabomizasidotataka.pdf
    • https://cdn.shopify.com/s/files/1/0430/8769/1925/files/xufutenokazopazefapagav.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/93414719665.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_off00005a8e.bin
16665f0ba72be06ce8f753b8bc37219eca8641d8259699ecf972aa226b68ac1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8E 5676 bytes
font_01_sfnt_off00006dca.bin
1e0e150e98026b44436a6e01f866685cf07ecc69768a822b77dc6ac554dac57c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 9972 bytes

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