Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ac05a216b3f868…

MALICIOUS

PDF

32.8 KB Created: 2020-08-31 14:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c6aa62ce2baf21cfb10f9907556fc9 SHA-1: 86d8c84384421d72fc6a1fb3b48a93e7116cd95f SHA-256: 55ac05a216b3f86810d3dc28b24ad5405e6be5c199cbf8ddc4856981040bda72
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'ttraff.com'. The document body and embedded links suggest a lure related to 'Bushcraft 101 pdf francais', likely intended to trick users into visiting malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=bushcraft+101+pdf+francais
    • https://static.usrfiles.com/ugd/87b9a8_b1ad8a5a95f44cac8fcee52c64ca9450.pdf
    • https://static.usrfiles.com/ugd/affb4a_7981c5c12e2845f7b38b199326c40c80.pdf
    • https://static.usrfiles.com/ugd/b91566_ee567751e0424a4384e8e9615ef15a6c.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/sazewugefafulojebewas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/japalugijuledoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/frontline_magazine_august_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/samsung_ht_bd1250.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/indexing_and_abstracting_services_in_libraries.pdf
    • https://cdn.shopify.com/s/files/1/0438/8179/1643/files/prime_factorization_of_180_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6590/files/gravity_falls_intro_piano_sheet.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_off0000424e.bin
8a476346085c19a49780cd59080857268136bc48776ea84b8876639fd13d0825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x424E 5456 bytes
font_01_sfnt_off000054db.bin
24e1171d3613bead1648058ed48c7a9ea2d82c5d32b64dd6a76bd62c10803e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DB 10072 bytes

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