Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d79c29820c44d2d…

MALICIOUS

PDF

37.6 KB Created: 2020-08-11 08:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 918d8ecbb68ae89fa58f656e05fdbec5 SHA-1: 0db2bab2e0e8596a9a018c25e642719dc1dde5d5 SHA-256: 8d79c29820c44d2d2ecf66388a285a8f2efbb6c5da502c34aef93779c51b9c5c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=absceso+hep%25C3%25A1tico+pediatria+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to PDF files and the redirector URL, suggesting a lure to download further malicious content.

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=absceso+hep%25C3%25A1tico+pediatria+pdf
    • http://files.oatsnstuff.com/uploads/1/3/0/7/130776743/9471038.pdf
    • http://jepitiko.integrium-sg.com/uploads/1/3/0/7/130775850/kifasinopuvesetimezo.pdf
    • http://files.sdhpitt.com/uploads/1/3/1/4/131438676/zopemiki.pdf
    • http://files.onceuponarockvermont.com/uploads/1/3/0/7/130775084/fakojabuwizutaboloka.pdf
    • http://files.skatecoachkristina.net/uploads/1/3/2/8/132815960/af8a23.pdf
    • https://cdn.shopify.com/s/files/1/0438/6983/1323/files/absceso_periapical_agudo_y_cronico.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/kowenupasovava.pdf
    • https://cdn.shopify.com/s/files/1/0433/4708/3429/files/88158597860.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/64577993735.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/mefosikiboxot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/51767358507.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1472/files/32187188703.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/heat_and_mass_transfer_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7778/6018/files/98854409875.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/gatejizeragegiwuraduxo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/tefelunefisuburuzeludogev.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/27063487037.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_off0000521f.bin
c52df6911af043347a236a77d62403120605214299b6a1105c29778dc7393c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x521F 5576 bytes
font_01_sfnt_off0000646d.bin
7d63ccf8bcc562607ec8605d323d1aeb3d8107525d94b74eb33aac557a0d618a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646D 10772 bytes

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