Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44660657ffde886…

MALICIOUS

PDF

36.0 KB Created: 2020-08-22 11:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bdc2411db290cebcb420d3674bf0a8e SHA-1: 8057ffea6f05a852234715b5b2f3aea0fdb7bf48 SHA-256: f44660657ffde886dd3eaf80e7570df469dd47f706d175a5f846c0df4af13344
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'multiplying integers word problems worksheet pdf'. The presence of numerous links, including those hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL is ttraff.com, which is used to redirect users to further malicious sites.

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=multiplying+integers+word+problems+worksheet+pdf
    • http://vuguxo.spinwizards.net/uploads/1/3/0/8/130814328/7734d700a.pdf
    • http://files.northeastgafoodallergy.org/uploads/1/3/2/6/132682022/kegizadukimij.pdf
    • http://vegaxul.noramacquarrie.com/uploads/1/3/1/4/131438309/fb387.pdf
    • http://kironek.appalachianflyandyak.com/uploads/1/3/1/3/131380600/4ed8b18907.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/reduce_size_macos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7014/files/61699897342.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/fight_arena_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1134/files/diwoxur.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/wipurojabizimafedov.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/togetomevavapizoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/que_significado_tiene_la_palabra_languidez.pdf
    • https://cdn.shopify.com/s/files/1/0452/3006/3773/files/best_reader_for_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/bollywood_movies_free_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/18852845348.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_off00004c8c.bin
e2c798cbd40bcbc8ea9726414698cfdaea207e51f2025f6e00721141df4e2e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8C 5648 bytes
font_01_sfnt_off00005fb4.bin
8795eb543453e4f0873ce42f3f511256e03a0ab33d6f3aeaa98e01b21e436669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB4 10368 bytes

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