Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7f808948b9e45e…

MALICIOUS

PDF

55.4 KB Created: 2020-07-30 14:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dd4429bb9ea75090ce7648edc87c621 SHA-1: f165bfb3b145a3a841632a8f2ca4bc3f1dc36831 SHA-256: 7a7f808948b9e45e634e884a41cbc8b294de593b50c864095213ecc2f275e37d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The embedded document body text is heavily corrupted, but the presence of 'Diagnostic microbiology scott pdf' and the authoring application 'wkhtmltopdf' suggest a lure document. The primary malicious IOC is the ttraff.com URL, which is likely used to funnel victims to a 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.com/pify?keyword=diagnostic+microbiology+scott+pdf
    • http://files.snappycontentwriting.com/uploads/1/3/1/4/131437308/ffdee3.pdf
    • http://files.maxdesigns.com/uploads/1/3/2/7/132740501/ladabevubuv-rododekuva.pdf
    • http://files.launcestonmountainbikeclub.com/uploads/1/3/2/6/132695586/b62e817ba84ed5c.pdf
    • http://files.gabysartgallery.net/uploads/1/3/1/4/131438423/490055.pdf
    • http://files.maxdesigns.com/upl
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/kemogokubidipejade.pdf
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/dirixom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/vuripi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/kezejemuxetoxenepasowilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/26550531286.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/nivasifefusalivix.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/77917311148.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23651487672.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/47724144772.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/ximozevasixonazolosamefun.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/17181021178.pdf
    • https://cdn.shopify.com/s/files/1/0434/6868/5464/files/xudodomovosigezas.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_off00009a78.bin
a3ddcc8ba5f85948d7f4233bbc1605837e0a022c71ebaf4638576a9244bceb9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A78 5384 bytes
font_01_sfnt_off0000aca7.bin
f56f5f1e0de2beb81605e1d2a389aee7aee21499e2348ffe75a64908dd06322b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACA7 10420 bytes

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