Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18ed5cc65458abb…

MALICIOUS

PDF

57.2 KB Created: 2020-08-11 03:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55da77f46c1f15c13afbfd426b2fb83f SHA-1: 7dca30df5115942f629db08674dd7a959d356690 SHA-256: a18ed5cc65458abbe460620ffabc2ddce2cf6a7ec9bbad36682bde63d80720be
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One prominent link redirects to 'https://ttraff.ru/pify?keyword=all+my+sons+arthur+miller+pdf+free', which is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same search query and a similar redirect URL, indicating a social engineering attempt to lure users into clicking malicious links under the guise of providing a free PDF download.

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.ru/pify?keyword=all+my+sons+arthur+miller+pdf+free
    • http://files.iuaplantsale.com/uploads/1/3/1/1/131164159/gikededazuw.pdf
    • http://rawud.oneburgh.com/uploads/1/3/2/7/132710712/paginabediruka.pdf
    • http://vuvibe.bullstonehouse.org/uploads/1/3/0/7/130775768/5fdf3f0a.pdf
    • http://rukagex.stepheningram.net/uploads/1/3/0/9/130969754/bagavupinubujituk.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/sufivojekazuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/mevigovuzekebutixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0434/3326/3253/files/21768609825.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/kodovovofuwutij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77160317291.pdf
    • https://cdn.shopify.com/s/files/1/0431/2337/6277/files/52294429352.pdf
    • https://cdn.shopify.com/s/files/1/0437/4793/4359/files/anglomaniacy_food.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/fasepumud.pdf
    • https://cdn.shopify.com/s/files/1/0432/3174/0066/files/11609406343.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/nojik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000959d.bin
87101293e2f4d5728f382d6d66d731851a7fb0793d3c8c7775766be7cc28d95f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x959D 5252 bytes
font_01_sfnt_off0000a74b.bin
84f3d523c9861b65c8f955537d7be37b73c9d890cc8e6c04e8a471a6951e6de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA74B 10220 bytes
font_02_sfnt_off0000c9f9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F9 4324 bytes

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