Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbf5515c46bdcce…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 02:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b652a3fb2b198b58c57ab74f82770e48 SHA-1: f7a80b368ed342f32958fb81330d2fc8c54415a0 SHA-256: 1fbf5515c46bdcce52b9ffd570570b50c8ed6c8526f90942ed2ab9d81ef58df8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a large number of external links, many of which point to a redirector service. The ML classifier also strongly indicated maliciousness. The embedded links suggest a social engineering attack, likely aiming to lure users to malicious sites by disguising them as legitimate documents.

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=construction+company+profile+sample+pdf
    • http://nugida.kendallgrundyfb.com/uploads/1/3/1/3/131383483/4300484.pdf
    • http://files.sarahhaleyeducator.com/uploads/1/3/1/4/131410736/poxupilita_lebodetida_bofakigi.pdf
    • http://files.yecsonline.org/uploads/1/3/1/4/131453536/a6e1114.pdf
    • http://files.griffinschiller.com/uploads/1/3/1/6/131606396/mukawutajegojif.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/bacteriuria_asintomatica_en_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/57493164484.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/37495053905.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/19913532584.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/72439968990.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/77537935673.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/33474541347.pdf
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/29355636621.pdf
    • https://cdn.shopify.com/s/files/1/0434/8615/0816/files/solidworks_cswp_preparation.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/xolotepivadifaniro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/gesibemogakaxab.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_off00006369.bin
3fa9a0a70b01fe56a6a1461625c3299aa3195e9468a49300f3eb25bbb840c814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5308 bytes
font_01_sfnt_off00007566.bin
f7a10f55b3797aa68df22de72d2a139d1db4cdecfbfe1f72ea66622f35d12b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7566 9964 bytes

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