Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c267306582aa55…

MALICIOUS

PDF

35.7 KB Created: 2020-08-05 06:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 618c36a19a1de719d19ad6b47a4682f0 SHA-1: c2055acc7a74411002206b8d1aa9388a459d09d6 SHA-256: 48c267306582aa55dd8438693e8133b54d134ba1fa67ffeb438fb762f2687cad
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=simple+present+tense+adverbs+of+frequency+exercises+pdf, which is likely intended to redirect the user to a malicious site. The presence of many links to Shopify-hosted PDFs suggests an attempt to blend in with legitimate content while directing users to a malicious destination.

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.com/pify?keyword=simple+present+tense+adverbs+of+frequency+exercises+pdf
    • http://files.broadhurstpreschool.com/uploads/1/3/1/4/131482975/4735893.pdf
    • http://files.ameliaguild.com/uploads/1/3/0/7/130738710/3219507.pdf
    • http://files.perfectpelvicfloor.com/uploads/1/3/0/9/130969297/241985.pdf
    • http://files.psacollegecounseling.com/uploads/1/3/2/7/132712614/1307266.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/wovinolifosax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/fokixez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tizisixurodegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7471/files/69502076566.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/43593162883.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/bododilatutugotekikol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3785/files/large_treble_clef_staff_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/68092016651.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/29333249595.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/43521885869.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_off00004be4.bin
08674f13fca8970f19dfefcfecab6e0cb944c7f55e92edc0fbcb14c9c5975087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE4 5900 bytes
font_01_sfnt_off00005fe7.bin
66f3a533ce0890255d519e31a8b7638cd384a317bee7090bac8373bfed0f36ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE7 9908 bytes

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