Malicious PDF — malware analysis report

Static analysis result for SHA-256 c844c514f0176d3f…

MALICIOUS

PDF

52.7 KB Created: 2020-07-26 09:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a128648b4994fa6ac440dede9234a247 SHA-1: bfca6b4f046c1101493253d680208e2faaa17a89 SHA-256: c844c514f0176d3f7399c8f3e30f3a040b4d4130e0689562fe24dfc1bf427679
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. This indicates the document's primary purpose is to redirect users to a malicious destination. The presence of a large number of external PDF links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute content through a seemingly legitimate platform. No scripts were extracted, but the malicious link is the highest priority IOC.

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/pify?keyword=gate+2018+question+paper+mechanical+pdf
    • http://files.memoriescharcoalhouse.com/uploads/1/3/2/7/132710669/5511489.pdf
    • http://files.topthispizzacrusts.com/uploads/1/3/1/8/131856112/tinezex-pewokizinixudod-vaxes.pdf
    • http://files.freelandfairs.com/uploads/1/3/0/8/130814342/7650499.pdf
    • http://files.memoriescharcoalhouse.com/u
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/xizazakakugejidozokor.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/59389472362.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/67843912483.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/4530265254.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/1147846207.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/fusoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/sodolijosagimadam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/faxapidigogurar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/gigujitezikoped.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/25598279807.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_off00007b7a.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7A 6744 bytes
font_01_sfnt_off00008c5f.bin
c74abea81a2d07198025dcf7a2523e8224e3cd6d11294a53e5d78f07708d654f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5F 5956 bytes
font_02_sfnt_off0000a073.bin
9d82fcb1bcb94bcea789b3f19daaebae99c264ae855b6213ba607384c0383b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA073 10712 bytes

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