Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4447957b57f82a…

MALICIOUS

PDF

60.1 KB Created: 2020-08-07 07:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7968d05827895d87bc41e9ee51c18410 SHA-1: 55d7c42854704b62fa61623daa8a3db1ed3fc0f5 SHA-256: fb4447957b57f82a82217a433e9808094bee0d7adafbb6ae22fe77d0f178857a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a string that reconstructs to the malicious URL, suggesting a lure for users interested in Arduino tutorials. The PDF also contains numerous links to other PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content.

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=arduino+kit+tutorial+pdf
    • http://files.cagleauction.net/uploads/1/3/1/8/131856071/4055567.pdf
    • http://files.procu.org/uploads/1/3/1/4/131437363/4b0173.pdf
    • http://files.globallearningeducation.com/uploads/1/3/2/7/132740264/kunozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/motokilibaledapodid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/11275646609.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/70639625795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/baxijis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/33188532611.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/dabiropelegabifoviw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9201/files/raw_diet_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/rosoxotefixapode.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7345/files/agarose_gel_electrophoresis_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/45755454810.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/jajegolukoronopijekuwi.pdf
    • https://cdn.shopify.com/s/files/1/0439/8976/2206/files/poniwufus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/the_longman_writer_8th_edition_free.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_off0000ae03.bin
2d0ede8422a58051b9121c3d0e2dbeecd81486d6e637e658ab7da6ad88624ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE03 4908 bytes
font_01_sfnt_off0000beca.bin
dda1074b9fff6922a92bd5ba0d38465b25cd68d5a40c6b4773693ff1beecdf8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBECA 10752 bytes

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