Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13d84b55eef0efb…

MALICIOUS

PDF

41.1 KB Created: 2020-08-10 09:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a674794625313e6e1e8a80d981277c5f SHA-1: f766d03f65bed953e17f6143ed5be44fb87c99ab SHA-256: f13d84b55eef0efbdfea7cb78ae2163776851b306edc754e3af19ceb19846bbd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=bring+me+to+life+evanescence+sheet+music+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The presence of a link farm heuristic further indicates an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the embedded URLs are sufficient to infer a malicious redirection attack.

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.com/pify?keyword=bring+me+to+life+evanescence+sheet+music+pdf
    • http://files.yourdayweddingsindiana.com/uploads/1/3/1/1/131164479/fulidas.pdf
    • http://files.moxieblog.net/uploads/1/3/1/3/131383456/633fa3e6.pdf
    • http://lunami.ruthannsart.com/uploads/1/3/2/3/132303382/xefesazuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/lunumudawuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/80506307587.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/chelsea_handler_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/java_stream_filter.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/stochastic_oscillator_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/3129/6160/files/water_quality_data_analysis_and_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/aspirin_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/55208583370.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/7810160699.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/99295117606.pdf
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/91171868844.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_off00005549.bin
4232cb107da5b294835bf248bd408e7018028011b02b20feb91ccb14a288e487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5549 5680 bytes
font_01_sfnt_off0000687a.bin
c058dea966220bf23016fee896ea71308bfd5553fe85b5d16216b885dbb49c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687A 14288 bytes

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