Malicious PDF — malware analysis report

Static analysis result for SHA-256 8690831a45d38e50…

MALICIOUS

PDF

36.5 KB Created: 2020-08-10 18:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4738a8bcc6f509a61b872b8e744e828 SHA-1: c1bae7b32a2df8d0827d7f20805fae65120c4a3e SHA-256: 8690831a45d38e50382997554b009a3aed2a01a0444652df0601e1bb16dae6fc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary malicious URL, 'https://ttraff.cc/pify?keyword=mis+primeras+1000+palabras+en+ingles+pdf', is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious content through a chain of links. No scripts were extracted from this sample.

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=mis+primeras+1000+palabras+en+ingles+pdf
    • http://files.gabreedesign.com/uploads/1/3/1/4/131452824/buvoxolagivufife.pdf
    • http://files.levusboutique.com/uploads/1/3/0/7/130775197/gasunojedurofuv.pdf
    • http://files.padreamplayground.org/uploads/1/3/1/6/131606169/9196304.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/83765245567.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/21961316821.pdf
    • https://cdn.shopify.com/s/files/1/0435/9543/2099/files/achievement_cape_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/applied_mathematics_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/dilopibaji.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0175/files/25169247705.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7090/files/46583788526.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/58175136423.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/43800580419.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/paludeximegelule.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/24298976059.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/general_allotment_act_of_1887.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/personal_assets_and_liabilities_statement_for_sbi_home_loan.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_off00004c68.bin
5ea38c6b4ba7fefad0871074d6aff1ff789f284ea365e5eea37c67c1f262befd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C68 5700 bytes
font_01_sfnt_off00005fb4.bin
a30cd36df598469432d71a041ffbd8613b0bdb02cff7106e12d5ba88a82582ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB4 10916 bytes

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