Malicious PDF — malware analysis report

Static analysis result for SHA-256 565c308f4f08aca2…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 15:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b588a9d8774c74688787b3810d6f50ab SHA-1: 71b5846619ad4fe8d4dba35036831a1a788634bf SHA-256: 565c308f4f08aca28d45d6c9b31c2cae0bbe76ad0c2a82f21e09815c629cb6a0
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a pool inspection report, aiming to lure users to a malicious site. The PDF also features a link farm, with many links pointing to Shopify domains, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=pool+inspection+report
    • http://kawuwije.msmarlenesoffice.com/uploads/1/3/1/3/131384536/0c6fc73e2bc.pdf
    • http://files.twin-city.org/uploads/1/3/1/3/131378942/tidifu-zuwono-modagozixiwu-wifotob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/paripurupoladukejikumebon.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/counter_strike_source_setup_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/oxford_english_dictionary_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/85354213314.pdf
    • https://cdn.shopify.com/s/files/1/0437/6156/5850/files/adj_dmx_operator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/5621/5702/files/7._snf_sosyal_bilgiler_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/electrodynamics_griffiths.pdf
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/trichophyton_mentagrophytes.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_off00006dd2.bin
1edc56af0a534cb9af2324f451e2be669dc20468f4a0a6ce4c09d6c5d4f56277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD2 4716 bytes
font_01_sfnt_off00007de7.bin
0c4e222d77f210d647ac5d0cd3df712e305395c0f9f7dc1a744c971f67441bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE7 9976 bytes

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