Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc4f0d6c71dd183…

MALICIOUS

PDF

43.0 KB Created: 2020-08-24 19:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b39e3bfad1f675bb558b428749383f62 SHA-1: acddbf72967a73db9fd732997fceedff6a3867a9 SHA-256: 4dc4f0d6c71dd183a507d19aec72fa458a1d843a13809983141c214b82874731
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=setgt+in+free+format+rpgle', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of numerous Shopify links, some confirmed benign and others unknown, indicates an attempt to blend malicious links with legitimate-looking ones.

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=setgt+in+free+format+rpgle
    • http://files.tangolikeaboss.com/uploads/1/3/0/9/130969242/sapukusasejosek.pdf
    • http://files.blackscarcomics.com/uploads/1/3/1/4/131436967/notojuwegegawekus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/abap_in_21_days.pdf
    • https://cdn.shopify.com/s/files/1/0440/3052/5590/files/visasowuzatixunozez.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/lutadikanegivowoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/mitoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/7246/9669/files/62887167750.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/denawisifujigazok.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/2020_calendar_with_week_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/psp_custom_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/5044574112.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/bash_associative_array.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_off00005b5f.bin
6f4b5af080a554dbc0129bbda755592a95fff6590659840c8064c9089b339cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5F 4932 bytes
font_01_sfnt_off00006c03.bin
f0b401540280d04a60980b652f2eb540ae4c14a9e92e41ac477c035f82e2e4a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C03 10980 bytes
font_02_sfnt_off00009172.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 4324 bytes

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