Malicious PDF — malware analysis report

Static analysis result for SHA-256 54833a13c4dbad95…

MALICIOUS

PDF

32.6 KB Created: 2020-08-03 07:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f7be4f96e453bb0b4e9cb953bd7f93d SHA-1: 9820a46ab230b49567dda755825e06de4e785c01 SHA-256: 54833a13c4dbad952aad1bd547dfa4fbefb6ff562d5d2e8a951b81fc9729384f
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 pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=kaeser+compressor+manual+pdf', suggesting a lure to disguise malicious redirection. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious infrastructure.

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=kaeser+compressor+manual+pdf
    • http://files.concreterentalsnyc.com/uploads/1/3/1/4/131437724/rusumatul.pdf
    • http://files.easyairrentals.com/uploads/1/3/2/7/132740623/lawid_sasigeledo.pdf
    • http://files.refurbishedca.com/uploads/1/3/0/8/130873975/8452518.pdf
    • http://files.precisioniceandsnow.com/uploads/1/3/2/7/132741110/802277.pdf
    • http://files.jamboreedevotions.org/uploads/1/3/1/4/131438046/xowijesalujafid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/21978712067.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/fallen_aasimar_5e.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/default_parameters_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/74402127934.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/78789761202.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3089/files/28996249534.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/namulofikakogag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0433/8221/0725/files/kiluw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/41436511535.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/9387284470.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_off00004427.bin
0a036fa2f9c2de2b86e9141778256c4db306d81520898e52364cb3ea25737b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4427 5268 bytes
font_01_sfnt_off000055fc.bin
57c6e20c9343ebc0cc6d103c667d32bc800edf2e7d57cdae73059e4666785e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FC 9320 bytes

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