Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f15913aa648825f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-17 04:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d89b9e82dda90b16f05f61aaacc351e SHA-1: 8ed375c0c07fbc22c58ea76091b0c55f3bf05d29 SHA-256: 9f15913aa648825f6fb34f2106fed04f0fdbafb876261b804a1cd142310a1a24
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or phishing lure designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=allcast+premium+apk+direct
    • http://files.huyckpreserve.org/uploads/1/3/2/6/132682639/kudenomolapirado.pdf
    • http://dirutino.updosstudio.com/uploads/1/3/1/4/131483281/3104351.pdf
    • http://files.crestridgefarms.com/uploads/1/3/0/7/130775462/kadalel_lapitopig_ralidukefigi_libujelowowox.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/keep_track_of_your_bills_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/lekixetoxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6938/files/nozajinokunikifuxavofag.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/low_back_pain_home_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/lazemisatu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/68637820680.pdf
    • https://cdn.shopify.com/s/files/1/0438/7454/9928/files/50558818647.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/adverbial_phrases_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/matebugaguwezunakajofaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/33072372254.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/nom_035_riesgos_psicosociales.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/tesis_sobre_alcoholismo_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/numoze.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_off000062f5.bin
bae672f7c350d89dcaa53ac2f77b7c40361fbef8376daf62119f4ed03b70900a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 5272 bytes
font_01_sfnt_off000074c7.bin
b88cbadf2385794a9f344ae054f7320ead48bfdc89dc5b6bc30882d676a35738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 12028 bytes

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