Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cef44bacc3d4c4f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-26 04:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3edbbd3b2fb4f1dc0d03a48d934f17be SHA-1: 63062705927049ff5fb26ba96537c9e31ece9d40 SHA-256: 3cef44bacc3d4c4fdb6937a936c0a1130b513396a4950440451c96e827573acd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One of these links, 'https://ttraff.cc/pify?keyword=caracteristicas+de+un+microcontrolador', is identified as a malicious redirector. The document body, though partially corrupted, contains the same query string as this malicious URL, indicating the document's intent is to direct users to this malicious site.

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=caracteristicas+de+un+microcontrolador
    • http://files.northpointcg.com/uploads/1/3/2/6/132682792/zubapofovogazim.pdf
    • https://cdn.shopify.com/s/files/1/0433/5465/2821/files/download_john_wick_2_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/7213068112.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/74799617858.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7017/files/lesopazirakamerogovefodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/bible_archeology.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/60281548895.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/rifuwadavulekusezebuvilib.pdf
    • https://cdn.shopify.com/s/files/1/0437/7460/7514/files/16887091969.pdf
    • https://cdn.shopify.com/s/files/1/0461/9898/0757/files/rizafofosowekuwoge.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_off00006480.bin
bdd6c3ecac1b9dfd9e1078aa1ecabcfc7cbf8b6ae46158e7b23414116ceabed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 4992 bytes
font_01_sfnt_off00007555.bin
739af227d52ad99892db0ed18677afdc43a7db4ee8dd59afcb47353acbb802e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7555 11012 bytes

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