Malicious PDF — malware analysis report

Static analysis result for SHA-256 416e368d5b78dc17…

MALICIOUS

PDF

53.4 KB Created: 2020-08-24 19:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cb0bc9f058438a084fb0252ab2c53e4 SHA-1: 56f66ff7a4baf7e2a815e79564dafa76d7450f25 SHA-256: 416e368d5b78dc17e4b74ae3a7344062269cc345a7e70762792bf495347601c1
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.ru/pify?keyword=adafruit_gfx.+h+arduino'. It also exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on shopify.com. The document body is heavily obfuscated but contains the malicious redirector URL and several other URLs that are likely part of the link farm. The primary attack vector appears to be social engineering through deceptive links within the PDF.

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=adafruit_gfx.+h+arduino
    • http://files.warp-drive-physics.com/uploads/1/3/1/1/131164236/f1f2eb.pdf
    • http://wopube.dslvnjny.com/uploads/1/3/2/6/132696056/18b0ff5.pdf
    • http://vapilut.jeromecustoms.com/uploads/1/3/0/7/130775166/semugofagekivaz-kekuvewuguget-vimimapidalu-bosudemawa.pdf
    • http://kekozir.spotlightpac.org/uploads/1/3/1/3/131384635/makawemoxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/83510308242.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdf
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/spanish_accents_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/16943139773.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/specialit_e_brevetti_scout.pdf
    • https://cdn.shopify.com/s/files/1/0429/5111/4908/files/primera_cx1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/13633478459.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/56571409010.pdf
    • https://cdn.shopify.com/s/files/1/0443/0426/9468/files/82472854144.pdf
    • https://cdn.shopify.com/s/files/1/0440/0024/7958/files/vasinen.pdf
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/nubulujanovefanasuzota.pdf
    • https://cdn.shopify.com/s/files/1/0465/1817/3854/files/rawobuvogiwosiw.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_off00008e93.bin
4fd1786270c473674e6cee300dc5ae808942a6065736280184fe7d6be38c3924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E93 5076 bytes
font_01_sfnt_off00009fe1.bin
168f72ebc8f418d5dc01cca834eed76b6315de73775e3672342a520dcd8bcf44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE1 12940 bytes

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