Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3875841f833881…

MALICIOUS

PDF

62.5 KB Created: 2020-09-02 06:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd1cd6e06bcc2259fc61e6328106dd28 SHA-1: ee4de2fb99774a1f5024afc13905bf701cb6cecc SHA-256: 3e3875841f833881529c9cb4960e148b0d13dc23043c9eba3cf6c32c9a363aa6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=mystic+messenger+email+guide+another+story'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. The ML classifier also flagged this PDF with high confidence.

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/wix?keyword=mystic+messenger+email+guide+another+story
    • https://cdn.shopify.com/s/files/1/0451/3352/9241/files/51611124187.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vunususojorimit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/cine_filmes_v2_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/budonuxagiposugil.pdf
    • https://cdn.shopify.com/s/files/1/0428/7994/2812/files/47153576926.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/cacti-_0._8._8a._exe_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/teremaremuxunoraramo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/design_trends_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/dexeroxagazumu.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f1ae89cf41b429faa78f7ebe8b3003b.pdf
    • https://static.usrfiles.com/ugd/3cb679_ce116cf68ca242c48cb753264567c156.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009627.bin
d713669cc554cd84070cc2d8aba50b5b320d1820c29727066e1a7188db26cf53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9627 5460 bytes
font_01_sfnt_off0000a894.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA894 1800 bytes
font_02_sfnt_off0000b122.bin
47d0055921699e2af244f336f3a6fba5544ad2e90a57bf8f62e9958933f5970f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB122 10968 bytes
font_03_sfnt_off0000d6e4.bin
24a71c6d86f4159c3feb6ede84db7cc7d300dda8e0aa17aa2fbcba220c2008fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E4 16136 bytes

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