Malicious PDF — malware analysis report

Static analysis result for SHA-256 43940c30dfdbc130…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 02:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ea559b3750590be7165d4bf25d7ac7 SHA-1: ecc74a612b0b2a00380db99f5ef5640e1bf365ff SHA-256: 43940c30dfdbc1306c80255d3b32ae5d259938f574da66ebbf2de8937bc0c064
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of the primary links redirects to a known malicious redirector infrastructure at 'ttraff.ru'. This suggests the document's purpose is to direct users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct payload execution.

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/pify?keyword=aprendizaje+colaborativo+libros+pdf
    • http://files.rogersranch.org/uploads/1/3/2/7/132712006/zisutojavovaxamoxefi.pdf
    • http://files.ladamedustlaurent.com/uploads/1/3/0/7/130775743/7555744.pdf
    • http://lewesuvi.sonofatabey.com/uploads/1/3/0/7/130775162/274cec37e4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/english_reading_comprehension_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/aprendizaje_autonomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/motorixalipaduti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/5897771802.pdf
    • https://cdn.shopify.com/s/files/1/0438/5567/5542/files/pajikibenabutepamuvemupur.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/tibifene.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/jumekigomesaba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/mac_the_ripper.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/podamunajidirokewogexu.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_off00006236.bin
5a33697e8a4c8931e199d91878a2fdaa64e1a076839bc3589c223adb44417b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 5464 bytes
font_01_sfnt_off000074ea.bin
6bd3f55a24258049c5baa12730c79141400f21cf16cf5db6aa5f1caf7bbd5be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EA 11380 bytes

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