Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84e3ac57e684b68…

MALICIOUS

PDF

39.5 KB Created: 2020-08-14 04:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fbeca927b70b995246ddea4f550fcee SHA-1: 3fa547854521edac004c74a35c2151631a3a0c00 SHA-256: b84e3ac57e684b68bd23fc308f4398e5d695777b32da3b3a86362f50bfbfb0e7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, https://ttraff.ru/wb?keyword=como%20escribir%20en%20un%20pdf%20desde%20iphone, is identified as a malicious redirector. The document body, though partially obfuscated, also contains this URL, suggesting the intent is to drive traffic to malicious infrastructure.

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.ru/wb?keyword=como%20escribir%20en%20un%20pdf%20desde%20iphone
    • http://files.wanderlustvip.ca/uploads/1/3/1/8/131857920/9371008.pdf
    • http://files.beachesinsrilanka.com/uploads/1/3/1/4/131409090/6816093.pdf
    • http://pasitifa.marshcreekmini.com/uploads/1/3/1/3/131379179/0b6fc5e6d8eb23b.pdf
    • http://files.samanthacotterill.com/uploads/1/3/2/6/132681488/rizolusivom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/ariston_gas_oven_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2069/files/benatabakizowoxalixusape.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/dokiwabosedaxenonumed.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/banking_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/4387/1127/files/17641490601.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/22483756392.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/jajakorevup.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/nuvulogabepeli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10699911966.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/siritutezug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.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_off00005c65.bin
431990d581db62f5e55ce2510efbe5cdbc9a3c755d40d9ade00df9d9fefdb33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C65 5200 bytes
font_01_sfnt_off00006dda.bin
099d5ce4ff590f9d0ed334d447db51bee5872cb72d86bd615e626e3fbe259f9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDA 10360 bytes

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