Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83c04a445bae1c0…

MALICIOUS

PDF

38.9 KB Created: 2020-08-18 21:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a282c8da072d71af7b76a778b94fa7e SHA-1: fe602801f1ac8251d3752d3e59cdedbb524a879b SHA-256: f83c04a445bae1c075090b648cdcd0170acf9297da947a526476586967ee9f1a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=capuana+giacinta+pdf', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains a mix of text and what appear to be URL fragments, further supporting the malicious redirection pattern.

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=capuana+giacinta+pdf
    • http://logonozin.cafedeloco.com/uploads/1/3/0/7/130776445/nipibiki.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/77059663214.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/lakefufomizub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/atencion_alternante.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/diablo_2lod_cd_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/bapowi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/36418668942.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/biomagnetismo_pares_por_enfermedad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2322/files/joxikalezubosojokelevediz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/dakupilegiruv.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_off00005ba9.bin
bf5a46771c4c7a9c5bb7cf762f43678bda902dead14ad00995079bab5bbc3f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA9 4920 bytes
font_01_sfnt_off00006c81.bin
a4946760dfe0c2a42f3d4c1e043221f530dce6ff933675ac672912fc6fe6505d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 10320 bytes

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