Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fdd2eb23582085…

MALICIOUS

PDF

47.7 KB Created: 2020-08-25 18:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f13828c23b1c8f599f51067e4960182 SHA-1: 8cea0783f4f81df78584b6c34823b6b1fa6e0f36 SHA-256: f5fdd2eb2358208521a5c661bc361b7848d7f6645d4404e669905f101a827c4b
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=spear1403+androide+drag%25C3%25B3n'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0431/2137/7434/files/xovejebonaka.pdf' being one of the first identified. The ML classifier also strongly indicated maliciousness. These factors suggest the document's primary purpose is to redirect users to malicious infrastructure.

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=spear1403+androide+drag%25C3%25B3n
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131455883/jalupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/xovejebonaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/4868/9050/files/pekijifejesuvoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/anatomie_du_cerveau_humain.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/59509840756.pdf
    • https://cdn.shopify.com/s/files/1/0436/0467/2675/files/5_inch_binder_spine_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/kyle_lowry_rotoworld.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/4034455728.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7791/files/acca_p4_revision_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/66813363291.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/denikisineluletoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/52879553756.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_off00006793.bin
b4bd080246ae4b0f1e8d0fd4dcbb86a827d3eaf3ae312cf7780a3d12a359d39a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 5604 bytes
font_01_sfnt_off00007a6d.bin
b52893701b7c3126d010ddd66badfba6b775d639cd52f6882827f1fbde50bdd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6D 4016 bytes
font_02_sfnt_off000089c1.bin
b47fe14b25e20c4b5e689e112ac539a3f26a5161e713a9fa2461a3b8b62c00b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C1 11736 bytes

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