Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1f32f0e75ace97…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 23:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62a34ea50db44db578b2b0b91cec9e93 SHA-1: 0aa09cf65c8441faf58245d432f34a62fa034a81 SHA-256: ef1f32f0e75ace97b9d9d5b28644ddd844d978e0c2829239abd1cf8db2e30d7c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though partially corrupted, contains text related to downloading a PDF, further supporting the lure.

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=algorithms+robert+sedgewick+pdf+download
    • http://files.vidlersautomotive.com/uploads/1/3/0/7/130739081/mifazab-vuxob-fixomaja-dulidilizopelu.pdf
    • http://files.climbstation.com/uploads/1/3/1/6/131637073/677172.pdf
    • http://files.rotexsilversolutions.com/uploads/1/3/1/3/131383982/c2b36ade6e9587.pdf
    • https://cdn.shopify.com/s/files/1/0438/4735/2480/files/96736878893.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5348/files/wopufudaxudatoda.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/46907900995.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/woteboxeverurilab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/gonukaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/92825734122.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/75115749577.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/argument_in_court_case.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/kowaxogufumopadoparesutot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/41793984813.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/24218417351.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/14165961776.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/string_compare_java.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_off000063ee.bin
5fe4d0c858ba0b4d2f55b19b4669e57052ab62e56e783918d9a46c80d2646a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 5856 bytes
font_01_sfnt_off000077c3.bin
8294a6f07fdfe3dbda4bc6787eae14149a698b7f5c35e0a795b95be28efea451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 9848 bytes

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