Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ff950ffcda275f…

MALICIOUS

PDF

53.7 KB Created: 2020-08-04 23:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f87060c8844ca95c256b823a3b01c3 SHA-1: 3dfff8f04531688cbfce15713f07bc7b2324b4d0 SHA-256: 51ff950ffcda275fb467afe4f69ef2491c2e0919b7935ba77bb9b7f9cfdfba16
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'Cartesian to cylindrical coordinates pdf' and includes the malicious URL, suggesting a lure to a malicious site. The presence of a malicious redirector link and the sheer volume of embedded links strongly indicate a malicious intent to redirect users to harmful content.

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=cartesian+to+cylindrical+coordinates+pdf
    • http://files.ourplacelochsidelincluden.com/uploads/1/3/1/4/131483143/f0c02ba.pdf
    • http://files.geraldinepilgrim.com/uploads/1/3/1/6/131607712/susilikigiguwisom.pdf
    • http://files.opnrc.org/uploads/1/3/0/8/130814169/565fc1413.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/95091524774.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/13969448790.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/mogilixisovexomikigun.pdf
    • https://cdn.shopify.com/s/files/1/0436/3599/8880/files/93113621319.pdf
    • https://cdn.shopify.com/s/files/1/0437/1329/8581/files/54635594402.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/38305433207.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/77170916992.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/33577354823.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xirapekewovefosisukepeja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/dimimi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/fallout_4_change_face_console.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_off00006eef.bin
d0ec0317030e1a1e73e1070593e727f8b1732e91f2a47b1ebf4bb50a54113647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEF 5156 bytes
font_01_sfnt_off0000808d.bin
0022b65b77eeb92239f7d38374195dfce71641835053fbd4fb5d69e67baad395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808D 16332 bytes
font_02_sfnt_off0000b47b.bin
9693a288d8291130d0bd62c835c7f4d27879f5b9c42d0079905373d75f1b641f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB47B 16116 bytes

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