Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7c6a0ee92fc048…

MALICIOUS

PDF

41.6 KB Created: 2020-08-17 11:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 062b149d0426ec92573bbe765d41f449 SHA-1: 0982a00bd651f178d6c4739ab0423697d8afcc2f SHA-256: be7c6a0ee92fc0486b8b799fca315e2a5b64424d4dccea10f31e81dbc3c1229b
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=makeup+brushes+guide+pdf'. The document body, though heavily obfuscated, contains this same malicious URL, suggesting the PDF's primary purpose is to redirect users to malicious content. 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.cc/pify?keyword=makeup+brushes+guide+pdf
    • http://files.abbyloupottery.com/uploads/1/3/0/7/130740517/rekeroxelomalak.pdf
    • http://dubunebar.purelivingwithlisamorton.com/uploads/1/3/0/7/130738779/dodelebinej_dokejizalizape.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/dujamivamijufafebazoluzu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8977/9106/files/4046451892.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3298/files/97182173071.pdf
    • https://cdn.shopify.com/s/files/1/0438/7006/0704/files/las_reformas_borbonicas_en_nueva_espaa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/6th_grade_science_reading_comprehension_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/69120269038.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/83839741834.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/candidiasis_intestinal_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5165/files/navamitamewufidixop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/89384619755.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/posasabiboponazabe.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_off0000626f.bin
b84f9b2318971e5abcc902ce0ebe9bbba6312a7e95cc600661d596e6a812e3de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 5480 bytes
font_01_sfnt_off0000750d.bin
a655d3a2170b70040590a8a416c1b1db8a794ec4a69b8ccde0452618a5cfe457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750D 10856 bytes

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