Malicious PDF — malware analysis report

Static analysis result for SHA-256 27003b9a598ecbf2…

MALICIOUS

PDF

46.6 KB Created: 2020-08-31 07:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1666c1505a4e84268ca674ca8d25786 SHA-1: c3eeb92ac51f842b01fcb65f918efd5259ec6b7f SHA-256: 27003b9a598ecbf24687cf308bfb9c5abca49d63bfef7cca65c7c9d6d12a694f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=kip+3100+printer+driver+download', is designed to trick users into downloading a printer driver. The PDF also contains a large number of external links, many of which point to Shopify, suggesting an attempt to obscure the malicious redirector within a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=kip+3100+printer+driver+download
    • https://cdn.shopify.com/s/files/1/0428/4488/1062/files/tinkle_digest_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/33091034791.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/sukobokaverewoxudomufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1589/files/pogumixuparilowowale.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/budumuzozoxadusagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0463/0249/4877/files/butezoregesuzadiloga.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/mezosotolufabototuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/43577263481.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/85990843398.pdf
    • https://cdn.shopify.com/s/files/1/0459/2553/1815/files/home_economics_2011_leaving_cert_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6521/2066/files/46454285013.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/testprep_70-_697_configuring_windows_devices_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/0709/9558/files/79575823176.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_off0000656d.bin
ca03ea8d021f2bff0ecc04e302594bbe0fe31fe21bad70cb1e9a7260ab0bd6ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x656D 5044 bytes
font_01_sfnt_off000076b7.bin
ebb0d38ef5d91484d79d7e46ba7d27a7c8dbafa696b33109883c2b1470018e2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B7 12600 bytes
font_02_sfnt_off00009f26.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F26 4324 bytes