Malicious PDF — malware analysis report

Static analysis result for SHA-256 09aaa1ba1ec9b799…

MALICIOUS

PDF

60.1 KB Created: 2020-08-12 17:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f97b36214df77eaf37ad53c9f612f4e SHA-1: efa12422933bf698b539c2405460a918c4eb92aa SHA-256: 09aaa1ba1ec9b79917108a6aca8f23210859b516e6e93778501b982151367e31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that mirrors the topic of the document, suggesting a lure. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=disadvantages+of+genetically+modified+foods+pdf
    • http://files.freewheelspa.com/uploads/1/3/0/7/130775429/dbfca5ca920.pdf
    • http://files.windowsofhopeintl.org/uploads/1/3/0/9/130969310/772c98314.pdf
    • http://vesusen.glaciertwinsbaseball.org/uploads/1/3/1/4/131437949/c657fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6043/6900/files/jevebarujegas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/fuzajibupaled.pdf
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/59100783113.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/velefijumer.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/bupegazakolokivifekep.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/33474893038.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/76484339051.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/karebugofolil.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/1684072370.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/nokovafiwew.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/wexumodagoneg.pdf
    • https://cdn.shopify.com/s/files/1/0434/3824/3996/files/abramelin_squares.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a2f4.bin
6345620d8d626ab70ead310b2b87d04bae6a2d02e89d85bec6ac918b5111fb78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F4 5540 bytes
font_01_sfnt_off0000b5c2.bin
5c73ac08d3c0745af5be3be49f951a28b3461481fceb5d08248376e2b633f727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C2 2052 bytes
font_02_sfnt_off0000bf77.bin
b1d20e9fd8d520b0504ff4597e5c07c6ff7df690e35d5dea00cd7274635ba500		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF77 10304 bytes

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