Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae4bb15662298c4…

MALICIOUS

PDF

46.3 KB Created: 2020-08-05 10:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3e008387073e39242d0e84bc2820f62 SHA-1: d27b3be7a0245eecbd74cb4897ac9a904459c8ff SHA-256: dae4bb15662298c4d41848e50c5995b780dfb5923a5c6f15c2ab80a2d3b8bb85
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body also contains numerous links to external PDFs hosted on various domains, suggesting a link farm or a method to obscure the ultimate destination. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a redirection attack.

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/pify?keyword=antigona+pdf+download
    • http://files.verticalmilerally.com/uploads/1/3/1/4/131438397/3163382.pdf
    • http://files.boyanabalta.com/uploads/1/3/1/4/131438474/839c14ae8.pdf
    • http://files.pureblissacademy.com/uploads/1/3/1/8/131871992/nemavala_zikafutume_sabama_dovagow.pdf
    • http://files.gcs-fsaa.com/uploads/1/3/0/9/130969708/nexajodedonew-fokudipelujomu-gejupazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/pukajurevabosorikaxinowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/17951875157.pdf
    • https://cdn.shopify.com/s/files/1/0431/4923/0237/files/90092212048.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/40517952241.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/26704474294.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/renal_tubular_acidosis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/pivukimadak.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/44461983797.pdf
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/loxetosunumenop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/469129443.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/aprender_italiano_libro.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/bach_fugue_c_major.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062da.bin
57a547e862e27d38a831360582ed3fb915dcbf2af7a0708d08b544e57a80127f
pdf-font-stream PDF embedded font (sfnt) at offset 0x62DA 5016 bytes
font_01_sfnt_off0000741f.bin
caf086ee55c59ba3a18ff73b95a88b9590de3f2a73cfbc763e07700d04bdfc3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x741F 10044 bytes
font_02_sfnt_off00009688.bin
73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75
pdf-font-stream PDF embedded font (sfnt) at offset 0x9688 16120 bytes