Malicious PDF — malware analysis report

Static analysis result for SHA-256 c149468e8a1c0b33…

MALICIOUS

PDF

40.6 KB Created: 2020-08-29 15:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02fa2ad932dff94783361b8bd073c5a3 SHA-1: 4551a7ddc3cdd88558db370d199518b0ac642f3d SHA-256: c149468e8a1c0b33a516dd20e06bf7a992422cd831d950128eb4d6ef8d63e787
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=neal+butcher+oil+painting', which is flagged as malicious. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or a method to obscure the true malicious destination. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/wix?keyword=neal+butcher+oil+painting
    • https://cdn.shopify.com/s/files/1/0452/6574/8130/files/class_10_english_literature_reader_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/colouring_sheets_of_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0438/6222/9142/files/58265988832.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/chamakam_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/binojuxifisokez.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/gmat_algebra_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/sefofu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6451/4967/files/bewibufememewemuxoranap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/23614518358.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/child_hd_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3767/files/facebook_videos_chrome_extension.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/69007220150.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_off0000528f.bin
4114730de00c93c588c772362fca6039e4d7019f9fb0f5e2e6441d569a09388b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x528F 5008 bytes
font_01_sfnt_off00006385.bin
a497817993c1f9805026c98bf9ef0746e275b1d718fff0e6ed3ac677169ae92a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6385 10608 bytes
font_02_sfnt_off000087db.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DB 4324 bytes

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